BTW,
If you haven't seen this video of them on Letterman with the Boston Pops, it's definitely worth a view:
http://youtube.com/watch?v=AjLFG0i2_AE&feature=related
So weird to see how big they've gotten. I remember when they were playing small, small shows around here. They actually were supposed to play a good friend of mine's b'day party out in Denver one year after a show they had in Boulder. They ended up being too tired after their set and not wanting to do it.