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.
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.
+98
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.