Here's one to make you brick yourself (what does that even mean). The iconic, do-all Tricorder from the original 1968 Star Trek TV show has been recreated using LEGO bricks and a few shiny lights.
This thing is amazing. It replicates the tricorder perfectly and has awesome little hidey-holes for you to store your Starfleet gear in.
Tom Williamson is the genius responsible for this piece of awesome LEGO-ified gear, and if you head on over to his Flickr page, you'll see a LEGO Phaser and Communicator as well.