Bike registration would be a great service to outsource to bike shops. It generates foot traffic for the shop, costs almost nothing, and the local PDs can work

Bike registration would be a great service to outsource to bike shops. It generates foot traffic for the shop, costs almost nothing, and the local PDs can work with the bike shops in a fashion similar to how PDs work with pawn shops. Provide a national registry, sell ads, viola! YC 2013, baby! (Okay, maybe not, but a useful public service niche.)