GPS bike tracker

David K The two problems I saw with it:
1) Where do you put it that the thieves don't just take it off?
2) If #1 implies inside part of the bike, how do you power it?

Aside from that, I also think it's a good idea.

Good places might be in the bars or in the seat tube, where you can get at it to change the
batteries. Or maybe you could extract power from all the stresses in the tubes?

An idea like this has the potential to be a victim of its own success: the more people know about and use it, the more likely the thieves are likely to know about it and remove the tracker. I don't know what you can do about that. The early adopters obviously have the advantage, but after a few thieves get stung, then word is sure to spread. Maybe it should be such that the installation is irreversible, or (my favourite) trigger an auto-destruct mechanism if someone tries to remove the tracker.