Battery life is so good I don't think much about it. I charged it to full Sunday night, then used it heavily on Monday at work. Came home, and kept it on most of the evening, using the drawing program to take some notes while playing a game. Later that night I used it before going to sleep to watch some video, and used it more in the morning when I woke up to browse the web. Then tons more usage at work, including quite a bit of Plants vs Zombies while waiting on OS installs. This evening, the battery still had 25% charge left.
I'm not sure how people are getting great usage out of the battery. AionExchange will drain around 3% of the battery in 5 mins of use. iBooks burns more than 10% per hour. A simple hop from PHX to MRY (less than 1.5 hours above 10k feet) drained more than 20% and that was with WiFi turned off. Netflix isn't too bad though, around 15% of the battery used per movie.
Maybe it is just my iPad, but I need to charge it all the time.