QUOTE(TheMuffinMan @ Jul 30 2007, 05:30 PM)

I believe they should, why not just pay for like a time interval month with a credit card?
If you're referring to the store ones, I think you'll be ok, I would read the back of it to be sure before you purchase it
Unfortunetly, I don't think that 360 card will work with normal Xbox, because I tried a 48hr 360 code and it said that there were technical difficulties with my Xbox.