After one day, battery life seems ok
I got my phone on Thursday, and it is now Saturday, so I have had the phone for less than two days. That is not really enough time to form a strong opinion, but so far the battery life seems ok. I am upgrading from a G1 with an oversized, extended life battery, and this one seems comparable-- certainly better than it was with the Stock G1 battery. If you stream a lot of music or video you will definitely need to charge the battery at some point during the day, but I spent a fair amount of time playing with the phone including installing several apps, watching a few Youtube (and Vimeo!) videos, etc, and was above 15% when I finally plugged back in after about 16 hours (didn't check the exact level, but the indicator was in the orange, but not yet in the red).
I suspect that most users will have no real complaints about the battery life, but heavy users may be a bit frustrated.