Woot.com is an online store and community that focuses on selling cool stuff cheap. It started as an employee-store slash market-testing type of place for an electronics distributor, but it's taken on a life of its own.
Woot offers one product per day until its stock of that item is sold out or the product is replaced at midnight Central time with the next offering. If a product sells out during its run, the next item still does not appear until midnight, except during Woot-Offs.
Check it out.
Woot : One Day, One Deal