Thanks guys that's great. Would a non-contract AT&T one have any specific AT&T branding (i.e. do current AT&T Blackberries?) or any changes to the OS, or would it essentially be a stock Blackberry model without customisations? I'm keen not to have it deviate too far from how the official unbranded ones will function.

As for Expansys UK, the point was I wanted to buy it while away in the USA rather than wait till I return to the UK at which time it might still not be released over here!