Have to say the curve had the longest battery life of the three bb's I've owned. My tour's batt life actually isn't too bad -- almost a day and half of some browsing, fair amount of messaging, 1-2 hours talk time, but that also includes 6 hours of bedside mode. With the other bb's I rarely ever bothered to put them in standby mode, and I'd get almost 2 days use out of them.
My first battery never lasted long with my Tour; but I got a different battery (not extended, just a normal battery) and mine can easily last over 2 days. I'm a heavy texter/web browser/Social Scope user.