Well, that was well-prepared. No sooner had Steve Jobs waggled the new 3G iPhone on-stage in California, than Apple's UK site had a dedicated page giving all its specs.
You can get more info on the various new features there. It's got a page on the Apple UK online store too, although you can't place an order, what with the release date being July 11th.
Sadly, there's no confirmation on either page of the UK price for the handset, which will retail for $199 in the US. Don't expect a straight dollar-to-pound conversion, sadly – that'd be a bargain £100.