so far so good with 2.2. Three things that I noticed are:
1) No GPS response. I repeat No GPS.

I tried the *#142365# & nothing. any recommendations???
2) The "Alarm Clock" is now labeled "Clock." Well I failed to double check this after updating and my daily alarms were erased. I noticed this after waking up late this morning.

3) Qik was finally working (fingers crossed)

. I had MAJOR problems w/Qik working on 2.1 (i.e., it rarely connected).
Other than that - It's pretty good. I haven't tried the music player, but will test today. If GPS is the only issue, I think that I will keep 2.2 until the official release.
**UPDATE**
GPS Issue:
+1 for Google Maps - although it hasn't locked on my location, it can give me directions from my location
-1 for Navigation - It can't get past the location triangulation pop up. I switch to the traffic view and keep getting "Searching for GPS." In the Traffic View, I was able to get a triangulation, but no GPS lock. Triangulation was good.
+1 SprintNav - it's slow, but the Maps/Route (i.e., traffic) is ok
+1 Poynt - pretty good. I searched nearby for gas stations & resturants and got a pretty good triangulation
Music Player:
+1 TuneIn Music Player - sounds just as good as 2.1
-1 for Stock Music Player - I don't know if it's my setteings, but it sounds echo-ey, & not enough base (I check my EQ settings)
-1 on the battery life - As others have stated, the battery does in fact drain faster than 2.1.