It sucked at first compared to woot but now I almost like it more...
http://www.nibster.com/
Same concept as woot only they have more than 1 deal at a time and it's not always something having to do with electronics. For example they currently have a speaker set, a briefcase and a pair of jeans. They update almost every day, probably as they get new stuff in. Had some deals on jewelry and even a samurai sword over the weekend... worth keeping an eye on

Their prices arent good. They are selling that 3-piece speaker system for $33 which can be found at numerous other places for $15 or less.