I know my MBNA credit cards have this feature.
You sign into their webpage and you can generate 1 time use credit card #'s with a preset limit as well as a preset expiration.
No additional charges either.
Works great with things with hidden recurring charges, like those offers where you have to pay 1 dollar for something, only to find out they charge you 60 bux a month later.
Slashdot Mirror
have you upgraded the firmware? http://www.apple.com/ipod/download/
Time Warner in my area doesnt charge extra for HD-Net. I get my affiliates in HD as well as TNT and HD-Net.
I know my MBNA credit cards have this feature. You sign into their webpage and you can generate 1 time use credit card #'s with a preset limit as well as a preset expiration. No additional charges either. Works great with things with hidden recurring charges, like those offers where you have to pay 1 dollar for something, only to find out they charge you 60 bux a month later.