Deadly Boss Mods 3.20 is available for download now, it comes with 100% Sunwell support.
Note: This will be one of the last versions before DBM 4 (which will be a complete rewrite of DBM).

Changes:

Update #4: I added support for phase 5 by adjusting the Darkness timers.

Update #3: I changed the phase numbers (I started counting phases after Kil's spawn, but most people count the adds before Kil as phase 1.) I also fixed the announces for Phase 4 and 5 (was: phase 3 and 4, but both showed up as phase 2). This version also adds a timer and warning for Flame Darts.

Update #2: I added a whisper and say warning for Fire Bloom.

Update #1: I added a warning for Sinister Reflections (it does not announce their target, as this information doesn't show up in the combat log), raid icons for Fire Bloom and a fancy frame that shows everyone with Fire Bloom. (copy & paste from Kalecgos, disabled by default for non-healing classes).
You need to restart WoW after installing this update because it adds new files!

The current downloadable version of Deadly Boss Mods has a mod that supports Kil'jaeden. It can announce Orbs (there is only one announce per orb now as DBM now tracks each orb's GUID), Fire-dot targets and Darkness of a Thousand Souls.

Note: It does not announce the target of the Sinister Reflections and I don't think that it's possible to announce their target because it does not show up in the combat log.

Note: The Darkness timer might be inaccurate because Kil'jaeden finishes casting his current spell before using this ability.

Void Reaver Thanks for your combat logs! But there is still no event for his Arcane Orb. So it looks like the patch notes were incorrect.

Patch 2.4.2: DBM works fine with this patch, you don't need to update it. But the Void Reaver Arcane Orb warning still doesn't work - if you got a combat log, please send it to tanadu@gmail.com. Thanks in Advance!

Update #2: I just finished the M'uru mod and included it in the 3.11 core/bc mods package.
This mod will show warnings and timers for: Enrage, Void Sentinels, Humanoids, Darkness, Dark Fiends, Phase 2 and Black Holes.
The spawn timers for Void Sentinels and Humanoids could be off by a few seconds because I'm not sure about the initial spawn timers. The mod uses 15 seconds for the first Humanoid spawn and 35 seconds for the first Void Sentinel spawn at the moment.

Update #1: You can download the first update for the M'uru mod, it adds an enrage timer (10 minutes), adjusts the spawn timers and removes the function to announce who has the darkness debuff, as this is a completely useless information. (this announce was disabled by default and no one should stand in this huge void zone)
Sorry for the late update, I had not time for WoW last week due to exams. But you can expect regular updates from now on.

Deadly Boss Mods 3.11 is now available for download!
It contains all 3.10 updates (and a few more fixes/updates) and is ready for patch 2.4.2.

And the "old mods" package has 100% support for Naxxramas now!

Update #6 Added Kalecgos health frame and a warning for Felmyst's Demonic Vapor (green poison beam)

Update #5 I updated the Eredar Twins mod: I added an enrage timer and more warnings for conflagration and shadow nova (icon, whisper, etc...).

Update #4 Void Reaver (patch 2.4.1 only!) combat log wanted! tanadu@gmail.com
Thanks for the log files. Unfortunately I couldn't find any SPELL_CAST_SUCCESS or SPELL_CAST_START event for Arcane Orb. So the Void Reaver mod still doesn't work!

Update #3 I added a few timers for Felmyst's air phase.

Update #2 There is a (strange) way to fix the Void Reaver announce: it will work (sometimes) if the guy who is announcing is dead!

Update #1 Thanks for your bug reports! I can't answer all emails, sorry.

Known issues

• Karathress: spitfire totem announce doesn't work
• Kael'thas: some timers are missing: chat log/Kael'thas' yells wanted!
• Lady Vashj: mod doesn't load fixed
• Mount Hyjal/Wave Timers: wrong announces fixed?
• Lady Vashj: Static Charge announce doesn't work fixed?
• Moroes: Garrot announce doesn't work fixed
• Nightbane: Bellowing Roar announce doesn't work fixed
• Bloodboil.lua: attempt to index a nil value fixed
• Hyjal Wave Timers: Cannibalize announce doesn't work fixed
• Void Reaver: This is a bug in WoW and it will be fixed in Patch 2.4.2. The DBM announce will start working as soon as this patch is released.
• Akil'zon: Lightning Cloud announce broken fixed (really!)

All bugs that are marked as "fixed" are fixed in the current downloadable version.

Deadly Boss Mods 3.10 is available now, it updates DBM for 2.4 and has boss mods for Sunwell!
The latest World of Warcraft patch updates the combat log API, so I had to update all boss mods by rewriting everything that had to do with the combat log. Since I couldn't test the boss mods except for the new Sunwell boss mods on the PTR, there might still be bugs.
If you find a bug, please send me an email to tanadu@gmail.com or post on the forums with the following information:

• instance/boss/ability that didn't work
• error message
• combat log of the fight would be very very helpful as it contains advanced information like spell and mob IDs (use /combatlog to create a log file in the WoW\Logs folder)

BTW: You can also download DBM @ curse.com

Update 17: Alpha 15 contains a M'uru boss mod. I didn't test it because the PTR is down, but it should announce Darkness and mob spawns.

Update 16: Fixed the Conflag und Shadow Nova warnings, the emotes are CHAT_MSG_RAID_BOSS_EMOTE events.

Update 15: I changed the Conflagration and Shadow Nova detection, it now uses the emotes and can announce the target.
Btw: Thanks for the combat and chat logs!

Update 14: Alpha 12 updates the Eredar Twins timers.

Update 13: Blizzard fixed the EU test realms! :)
You can download alpha 11 now, it adds an Encapsulate (yes there is a debuff now, but it still doesn't show up in the combat log as debuff...) warning for Felmyst.

Update 12: Alpha 10 adds more Felmyst warnings. Some notes on Felmyst:

• It's not possible to announce Encapsulate at the moment, because it does not generate a SPELL_AURA_APPLIED event, only SPELL_DAMAGE events. But these SPELL_DAMAGE events are triggered for every player who is in range of the target. I'll try to add something like a debuff scanner to detect Encapsulate. There is no debuff.
• The timer for Gas Nova seems to be completly random
• I'll add a function that checks Felmyst's target to detect the air phase in the next version

Update 11: Alpha 9 adds a mods for Felmyst and the Eredar Twins. I didn't test the Eredar Twins mod and the combat log is 3 days old. The Felmyst mod only announces Gas Nova for mass dispel. More coming soon!

Update 10: Alpha 8 updates the Brutallus mod to work with the latest PTR patch.
Btw: You can disable or enable bars in the "Bars" submenu in the boss mod's configuration menu. The Brutallus boss mod has some bars disabled by default. (e.g. "Next Meteor")

Update 9: Alpha 7 uploaded. Some updates for Kalecgos and Brutallus.

Update 8: Alpha 6 contains an update for the Kalecgos mod, the frame can now use class colors for its bars. Remember to restart WoW if you updated from alpha 4 or lower.

Screenshot

Update 7: Alpha 5 can be downloaded now! I added the new "Spectral Realm" frame, but didn't test it yet. But it should work. EU PTR is down since 3 hours.... Note: You have to restart WoW after this update.

Update 6: Alpha 4 is available now. I updated the Kal..whatever mod, I removed spam announces and timers. It will now show a small frame that displays all ppl. in the "Spectral Realm". I'll update this mod to show a frame like the old Loatheb healer monitor tomorrow.

Update 5: I updated the documentation, you can find the new events here.

Update 4: Alpha 3 available. Adds an enrage timer for Brutallus.

Update 3: Wanted: Sunwell combat logs! You can create combat logs by using the slash command /combatlog. Please send me the file WoW\WoWTest\Logs\WoWCombatLog.txt (zip it please!) to tanadu@gmail.com if you want to help. Thanks in advance! :)

• Kalecgos (vLGrok)
• Brutallus (Giskler)
• Felmyst
• Eredar Twins
• M'uru
• Kil'jaeden

Update 2: Alpha 2 available, it adds a simple boss mod for Brutallus.

Update 1: Alpha 1 available! This version has a boss mod for Kalecgos, but it's untested because the european PTR char copies are bugged (the chars are copied to random accounts...wtf!)

I've updated DBM to support the new combat log events, I'll write a documentation for these new events asap. You can use the Kalecgos boss mod as an example file until I update the documentation.