I've been following this thread since it started, and thought I'd weight in my .02.
From when I got my phone, charged it up, lasted for just short of 5 hours. I let it full drain, power up to 100%, full drain, power up to 100%. Never got more than 5-6 hours. Found out about the Message app, I had the bug, fixed that, turned everything off but the phone service, manual updates, Advanced Task Killer installed and jumped up to an amazing 7-9 hours on a charge.
The last couple days I continued to full deplete battery, full charge, by the end of the work day, dead as a post. Last night, I went back to VZN and asked for a new battery. They gave me one. Got home, plugged it in overnight. Took it off the charger at 7am, and now 5 hours later, I just dropped below 60%.
Activity so far today: 3 phone calls for about 30min total, hand full of text messages, checked facebook for about 10 minutes. I don't know... things might be looking up. Just might keep this phone after all.
-Cornfuzzled