Cool stuff is simply that, stuff that's cool. It's something you look at and say "Neat!" It can be expensive or cheap, large or small, rare or common, all that matters is when you consider it, you realize there's something very cool about it.
SmugMug.com - A great site for showing off your pictures online.
LexMark PrinTrio - A very nice printer/scanner that won't put too much stress on the wallet.
DishPVR 721 - A powerful combination of satellite receiver and Personal Video Recorder.