Woot.com is having another Woot-Off today! This is where they sell one product until it sells out, then they put another product out there until this one sells out. And so on and so on. Shipping is always $5, and the prices are usually very good.
Woot Tracker
Woot Alarm
Woot-Off Guage
All Woot Tracker links complements of Spoofee.