Here’s a neat little tool: Pugchecker. All it does is take all the info on boss kills from your armory profile and display it in an easy to read numbered format, ordered by dungeon.
One caveat, apparently Drak’tharon Keep is very buggy about granting kill credits for Tharon’ja – if you’re dead or in skeleton form, you won’t get the credit (and often won’t get the achievement). I guess I got lucky. Anyway, here’s my Pugchecker page. Kind of cool!
Stop used to be a warlock, then he was a death knight; first he was Horde, then he was Alliance again, and now he's Horde again. For good this time. Lok'tar ogar! 
Ah-ha! Is that a confirmed bug about DTK? I’ve been getting all sorts of emails and comments about my bad DTK stats and I’ve sworn to everyone it’s not a bug in PUG Checker. Thanks so much for clearing that up for me.
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@Nance – oh yeah, it’s definitely not in Pugchecker. Tharon’ja is really buggy about awarding credit. I went through and checked most of my guild, including the ones I KNOW I ran it with, and NO ONE has a Tharon’ja kill credit on the Armory – yet damn near everyone has the achievement.
Wow, thats pretty sweet. I’m gonna have to pass this along to my guildies!
Just thought I’d post an update: I’ve added the Ulduar bosses to PUG Checker now. Up next I’m going to add the different Plus Drake scenarios for OS and then I should pretty much be done.