In the same vein as tons of new ____-sharing startups, Vayable lets you turn your time and knowledge of your community into a real service you can offer people. They distinguish between Insiders and Experiences, so if you're a visitor, you can hang around with someone who just really knows the area, or go on more of a tour-like experience.
Very similar to Trip4Real (http://www.producthunt.com/posts...) that was also posted today.
Nori
INK'A
Polywork
Delphi
Menagerie