Mrs Antichef and I both have the 3G and are due for renewal in Aug-Sep. Both will be updated. I do hope the battery life is improved. Not a problem for Mrs A, but for me it certainly is. I hope the simulated multi-tasking is ok, my previous phone was an HTC Touch Pro and it was what I missed with the iphone.
I reckon the iphone does about 90% of what I want better and simpler (and better integrated)than most of the other phones I have seen, so I will stick with it.