$10 Off of $50 purchase at Discovery Channel Store
 

I've been a Comcast customer for a while and got this deal in the mail today. Basically you just go to the site (url provided below) and with a purchase of $50, at checkout you'll be discounted $10.

Should work with non-Comcast customers, it's just a site, no code or anything. Unless there's some hidden "checker" that checks if your internet provider is Comcast...

www.discoverystore.com/ccast50

Hope it works, offer expires 31 March 2008.