Well, I can't believe how good the battery is for some of you. This is my 3rd or 4th full recharge. this is what today looked like for me, after a full charge.
Connected whole time to wifi and a couple of hours of it to the 3g internet connection. the whole time the gsm network I was on said 3g.
-brightness setting to the first two bars.
-vibrate off.
-facebook widget on one of the desktops.
-about 30 minutes of talk.
-approximately 2 hours of internet and im chatting.
-accounts costantly connected: msn, aim, skype, gtalk.
-xchat connected for about 6 hours in 3 channels, 2 separate servers.
-gmail set up on modest to update every 5 mins.
-gps map routing for about 30 minutes. took about 5 pics with geotagging, and sent one to flicker, e-mailed all 5 to a couple of people.
**EDIT** omweather also on the whole time set to update hourly.
it is now 11 hours later and I'm at about 10% left.haven't gotten low battery warning yet but I will soon.

I don't know if this is normal, but I would have liked a bit better battery. for the device to last me the whole day I feel like I have to limit my usage.
**edit** OK going onto 12 hours now, and this past hour mostly browsimg and typing this message. I also updated the omweather app.
I must add that when I Go to bed and set the device to offline mode, it seems to drain almost nothing. the battery the next morning is exactly or just about where I left it.