I let my Xbox Live subscription lapse because I never play online. But every time I turn on the Xbox, it complains that I need to update my credit card info. It turns out you have to call in and specifically cancel. And, because it automatically renews, when it tried to renew the last time with an expired credit card, it put my account into a 'suspended' state. And the only way to cancel the account is to first get it out of that state, by giving them a credit card number, and then they'll immediately cancel the account and refund that money. I told the customer service rep that that was, quote, "retarded".
All of this is academic, anyway, since all the Xbox Live Customer Service computers are down. "Is there any way you could call back tomorrow, sir?"