Cool StickNFind Bluetooth device.  About $25, Battery lasts for about a year.  I can think of dozens of uses.  Check out the Engadget article&video below. StickNFind Bluetooth stickers let you tag and locate your goods with a smartphone hands-on video.  

Cool Gadgets:  Face it, if you have an iPhone and a car you want one of these! Use obd ii to check your service engine light | GoPoint.

The Future Of… Credit Cards – SmartPlanet.com.