A co-worker found these guys a while back, L.A. Computer Company Store. They sell AppleCare at discount prices. It's legitimate, too - he bought one, registered with Apple, all is well. All of the options are "web special only", but that's fine.

AppleCare for a MacBook Pro is only $225.

The same product - purchased directly from Apple - is quite a bit more...
$349. And if you have an Apple Store anywhere in your state of residence, you might have to pay sales tax on top of $349.

L.A. Computer also sells AppleCare for iPods, Apple TV, iPhone, etc.