I think the first quest is when you get a tour of the Caverns of Time area. Find questgiver when you take first dragon into area (from meeting stone). She will walk you around the area and babble a bit.
Once complete, you get another quest when you enter the OHB instance. There is an NPC (next to dragon) that gives you bombs to go blow up a few camps. Then, after you blow up the camps, go into the tower, where Thrall is hanging out in the basement (in jail). Speak to him, and it will start the escort quest.
REMEMBER - make sure everyone is ready and is on the quest, or else they won't get attunement to BM.
The Thrall escort quest is a lot of fun. Just follow him around, and kill lots of bad guys. Eventually, he will stop when talking with a girl (top floor of an inn).
Once he stops talking to girl, you need to talk to her to start the final fight sequence. Then, go outside, do fight sequence, kill last boss, and an NPC will appear. This NPC will complete the final quest, and give you attument to BM.
Good luck!! It's a lot of fun.
Edited, May 28th 2008 9:23am by YJMark
Edited, May 28th 2008 9:23am by YJMark