Today I experienced that issue where the big battery indicator that comes up full screen indicated a 80% charge despite being plugged in all night. Re-boot solved it.
Glad Apple has acknowledged that one - for a few seconds I was worried I had a bum battery.
Also, new rumor that an official "yellowpages" app is coming within a month (AT&T owns Yellowpages). Hopefully Apple doesn't let AT&T write it.
If you haven't tried iphone.beejive.com, you should. It is an excellent solution for IM right now. Multiple simultaneous conversations, an interface that looks like it belongs on iphone, etc.