eltercerhombre - 3:35 am on Mar 12, 2010 (gmt 0)
I may say I haven't read every post here, sorry.
But if you're selling in GBP then you're probably in the UK. I may be wrong, but I believe EU laws doesn't allow to pass you personal data to the USA without informing and getting consent from every individual user. At least that's the way in Spain.
So, if you also sell the user database, check with a lawyer.