Wouldn't it be nice to get free Xbox Live time and Wii Points? Unfortunately, there is no way around this system as of now. However, I've been thinking.
Both companies sell points/time through a company called "Fastcard". Fastcard uses 10 digit codes on the card as a PIN. The PIN is entered when you redeem what's on the card. The simple answer is to create a keygen that creates a valid PIN. The only problem is that the pin is activated at the register. The obvious solution to that is to get a register/store computer or emulate one and connect it to the network that validates the keys. Easier said than done.
I'm just spit balling an idea, here. Is there anyone with more info on the subject?