I got a Thunderbolt through work and have been really enjoying it so far. It is not rooted (yet) and other than the battery not lasting long (I do have Advanced Task Killer running) I have not had many problems up until this past weekend.
My issue now is I noticed the the audio coming out of my ear piece speak to be very distorted. Not sure what happened. I cannot remember getting it wet or anything but is is REALLY annoying.