I really don't see THAT battery life issues like people say here.
Mine lasts for 1 day if moderate use, and 60%/50% per day on light use.

Moderate = 1h/2h of surfing web, 1h/2h of music (via Vagalume/last.fm), 30 minutes of talking, some gps using...

Light = 30-40 minutes of talking, 30-40minutes of internet and some music.

A few days ago I was traveling with GPS on, listening to some mp3, for like 5 hours (sometimes unlocking the phone to see my gps position or change track) and I've got only 40%/50% battery drained. Is good to notice that sometimes there was no 3G signal, so it keeps searching for signal, wich drains battery up...

EDIT: on heavy usage, I mean, really heavy, I get 5/6h.