Sometimes you're walking around and suddenly you think, "I could go for some anonymous casual sex right now." Well, maybe not you, but some people. Probably the same creepy people who post and respond to ads the creepiest, most strangely addictive part of Craig's List: Casual Encounters. I propose a service that will allow such a person to send a text message with his or her location and "m4w" or "w4w" or "t4m" or whatever. The service will then scrape data from ads in the user's area and send back messages with locations, contact info and other relevant information like "I know you lusts for me."

As far as I can tell, the tricky parts will be:

1. Location matching: even if I limit the type of location data that can be sent in (say, zip code), I'll have to do keyword searching for location-type info in the ads.

2. Figuring out what information from the ads to include in the SMS responses. (As far as I can tell, most ads are more than 160 characters.)