Hi. I'm going to be taking my 3G iPad to the US and I was going to get an AT&T data plan but from what I've read you need a credit card with a US billing address. http://www.att.com/shop/wireless/devices/ipad.jsp I have a UK American Express credit card and a Visa debit. Has anyone had anyluck getting a EU or UK card to work with the AT&T iPad data plan setup?