Mitch Wagner sez, "uGrokIt lets people attach RFID tags to their stuff, locate it with a device that attaches to a smartphone, just like in Cory's Makers." The Geiger counter-style audio cues are a nice touch, and I like the salaryman who uses the gizmo to remind him that he's left his phone-charger under one of those pointless stand-up cards next to the nearly pointless land-line phone in his hotel room.
UGrokIt (Thanks, Mitch!)
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.