Yes, yes, we know you're curious about what the Ulduar boss encounters will be like, loyal readers. With 14 bosses, 11 hard modes, and an optional heroic boss, we wonder, too! We'll be able to test some of these encounters on the 3.1 PTR soon, but there are, of course, those of us who just can't wait to know anything about what's going on in Ulduar.
Luckily, ever-resourceful players and dataminers have acquired information about spells and abilities related to bosses in Ulduar from the 3.1 PTR files. There's a lot of of stuff in here -- some of it may make it into the live game, some may not, and some may be related to vehicles or other sundries involved with encounters. I'm going to go into detailed analysis of those encounters for which detailed spells exist.
It goes without saying that these will be huge spoilers to anyone who doesn't want their Ulduar experience to be anything but pure, so don't read past the jump if you don't want to know!