One of my favorite sites is SlickDeals.net (even has its own rss feed). Now I’m adding Woot.com! As this article explains, woot.com lists a new item (and ONLY 1 item at a time) at midnight 5 days a week. The item is available until it is sold out. There are no people to talk to, no customer service, etc. Just great deals.
I still encourage you to do your Amazon shopping here.