After a few days of usage I find the battery life on the new iPhone to be awesome. On my 3G I would have less than 20% at the end of the day. On the iPhone 4 I have around 40% battery left. Just so ya know.

Later.

So I fit myself an iPhone 4. So far I love it. It is so much faster than my 3G.

The GOOD:
Camera (video & pictures)
Speed
Look and Feel
Lock orientation
Front facing camera

The BAD:
Antenna issues (not a huge deal)
Lots of glass which looks cool but a lot more to break
Cannot upload HD video over wifi