This just landed on my Christmas list with a big gorgeous thud.  Kevin Kelly has been blogging about inventive gadgets and devices for as long as I've had a computer, and he's finally produced a compendium of his faves.  Don't put this book in the bathroom or you'll have a bum ring from sitting there far longer than necessary imagining all of the things you can do/build/make/share/hack. Glory tool-e-lujah, baby.