I have ordered my white Hero through them with a T-Mobile contract for 30 pounds/month Combi plan, 300 minutes, 300 texts, unlimited web (fair usage applies). Its on an 18 month contract.
They have said that it will ship on Monday for Tuesday arrival, so I'm very excited. They have black and white versions and you can get contracts through T-Mobile and Vodafone. Shipping is quoted as next day air mail. I switched my phone number over so it took 2 extra days to do that, which I find pretty lame, but is probably a carrier issue.
As long as the unlocked white version of the phone is not buggy or gimped (crosses fingers, otherwise its going back) I don't see why everyone would not order through them to get cheaper contracts, choice of black or white, and choice of different carriers.
I will post again when I receive my phone!