Dude, where's my car?

My former co-worker write this application called WhereIsMyCar. You mark your car on your GPS-enabled phone on a parking lot, then it helps you find it.

I thought about a great idea for GPS-phones too! If you wake up in the morning and have no idea where you are and how did you end up there, then this application would tell your exact location, address, and a name of yours as well as of a person who's sleeping next to you. The target market is hard partying college students. I would call it WhatHappenedToMe.