MeetMoi- six degrees - dating
Fill out a profile. Then - presumably when bored or in a strange city with the husband/wife at home :P - message your location in. "331 West 4th Street 10014" (NY service). Up pops 3 messages of possible hotties nearby. et voila, true love. Ok I'm being silly, but that's how it works... From 6 Degrees guy.
Dodgeball
Only works in the US at the moment. But it seems you message in your name and location, and Dodgeball tells you who is nearby. If you message in a 'crush', youll be told when the love of your life is near by. This doesn't seem to be GPS/location based services. More like Twitter for dating? Or Groovr shoutouts for bumping into friends?

