You know what to do... unless you wanted the iPhone 4 in white which is unavailable for pre-order. Pricing for a SIM-free and unlocked iPhone 4 is set at £499 (16GB) or £599 (32GB) in the UK or €629 (16GB) and €739 (32GB) in France. Pre-orders are limited to two per customer.
P.S. The 8GB iPhone 3GS is out for those of you looking to keep it old school at $99 on a two-year AT&T contract.
Update: Looks like Apple's servers are struggling to keep up. For what it's worth, we hear that US pre-orderers are having more success with the AT&T link found in the source below.