Since I assume I'm allowed to talk about it now...
I've been running it for about 2 days now, and the battery life improvements are ridiculous. Oddly I've heard others report worse battery life compared to Froyo, but that is the complete opposite of my experience. In fact, mine is up roughly 50%. I have the Motorola Extended Battery, but still, compared to 17 hours a few days ago?
25.75 hours, in Performance Mode, Animations on, 7 widgets that rely on data, 4 email accounts (all push), 1 hour 44 minutes of talk time (I avg 3,000 mins/month), live wallpaper, and more. 15% remaining!