Just to add, I've had an iphone 4, an Epic 4g, and EVO, and now the G2.
The EVO and the G2 both have really bad audio quality w/pandora. (Both on Froyo)
The EPIC 4G which still had 2.1 sounded great while using pandora. (I fear for its future)
It seems this has been posted more than once on many forums and always gets ignored.
For those who don't notice the difference have not heard pandora pre-froyo or on an iphone.