I recently lost a phone, and in searching the internet came across a great website called WimpIt.com
It's a site to register your phone so if you lose it, the finder can easily find you and return your phone for a small reward.
It's best to register before losing your phone though.
Check it out.
Now I just wish they had a site to help me find my keys!
;-)

Hey man -- if you're still interested I found this site that gives you a little info about tracking a lost or stolen cell phone, and can connect you to companies that can do this in your area. It helped me out a bunch.

try
http: factualsatisfaction.freehostia.com/cell.html

First call your operator to get dem to block it! Some can actually block da fone (make it useless)!

what if your cell phone has been lost/stolen and you have no insurance?