iPhone 3GS: Upgrade?

So I have my hands on a new iPhone 3GS. Some first impressions. First, it is really really fast. Web pages, applications and start-up all increased by a factor of 2. Second, the new camera is excellent and easy to use (with zoom to scan in business cards). Third, voice control works very well. Speak Australian, there is no need to put on a fake US accent when saying names.

One final thing. I tried out tethering on Optus with my 3G iPhone over bluetooth. I know they are charging extra for some plans but I can tell you that it really works. I got 1.5Mbps speeds which is the same as I usually get with my NextG card. That is more than enough for casual browsing and downloading email attachments.