Ouch - the best of the free offers don't require a credit card to play them. If you want free Bingo with out a credit card entry (and your from the UK) then try these: Bingoliner (£8 free), Littlewoods £2 free and there's more here.
Yes, the ip thing is a problem. There are ways to circumvent it but it's a pain to do too. Guess we'll just wait until Americans are allowed to be part of the rest of the world!
That's something that makes me very leary of sites I don't know a lot about. YOu don't seem to hear of it happening to people very often but I don't want to risk it with unknown companies. I'm that way about alot of online transactions especially after my Visa card was compromised by the whole TJMaxx fiasco. What a pain that was! But it was a pain for 46 million other people too.