Battery life really improves over time. Not because the battery actually gets better, but because the novelty starts to wear off and you stop playing with it every two minutes.
After two weeks now, my battery is lasting about thee days or so between charges. That absolutely owns my previous Nokia 6133 and SE w600i, and it's on par with my previous Palm LifeDrive. It doesn't beat a crackberry, but then I didn't watch video or play MP3's on a crackberry.