While Phones4U can claim an exclusive for the white Lumia 800 on contract, Expansys UK is now taking pre-orders for the SIM-free version.
No price is set but don't worry--Expansys will verify with you before they charge your credit card and ship your phone. In addition, you can order this internationally meaning even those in the US can partake in the all-white Lumia experience (of course, you'll pay dearly).
The 16GB glossy white Lumia should be shipping in the first week of March. Head here to Expansys to get your preorder on.