Yes you get worldwide entry with your membership and it also works just as well the other way round as I used my UK card in Orlando in early December
Yes, Costco & AMEX/Costco Card,anywhere in the world, including the first store in Melbourne, Australia that I have been in Sept 2009, so long as it is valid, you can purchase anything in that country's currency.
what is the postage rate for a card to germany
This depends. First off, it would need to be an AT&T model, as Verizon models do not use a SIM card. Also, it depends on the UK carrier. Most would be compatible with AT&T's network, so yes, you should be able to use a US iPad 2 with a UK SIM. Although, take note that the iPad uses a microSIM, so the UK SIM card will have to be cut down to fit into the iPad.
+98
Yes its possible - you need a US gift card (you can purchase this online easily) and set up a US Itunes account. Then, get a random US hotel, use that address and phone number during registration. Enter the US gift card code and voila! You can purchase.
Unless your card is larger than normal, it shouldn't cost any more than a first-class postage stamp to mail a Christmas card from the US to the UK.
A 1 month Moshi Membership Time card costs £4.95 in the UK and $5.95 in the US. A 6 month Moshi Membership Time card costs £19.95 in the UK and $29.95 in the US.
Yes
No. Unless you have a UK to US power adaptor you can not use it.
a big no
Doesn't matter if you have a green card. It depends on your nationality.
US prepaid cards cannot be redeemed on an XBOX Live account tied to the UK.