Yes, Woot is a fun site. So is Shirt.Woot and now Kids.Woot and Wine.Woot. These sites sell a different item each day until they sell out or another day comes around.
"Regular" woot generally has geeky stuff, but they also seem to like vacuum cleaners.
Kids is brand-spanking new, just about a week old as of this post.
Shirt.Woot sells T-shirts. Some are a little wierd and all are very creative.
I have only ordered cheese from Wine.Woot and it was fantastic.