Someone started a National Bike Registry Non Profit, with some backing from the fine folks over at Kryptonite (the lock company). Called Bike Revolution. It's worth a look. It's free to register!
An important part of the system is registering your bike and Serial number. And you can add to it, by getting these great super sticky decals with the fancy new SmartPhone ID Tags. Any shop or Law Officer that sees a bike with the tag is likely to scan it, to insure ownership.
Frequently Asked Questions
We do have the ID Tags here at the shop