If you use a social media tool like Twitter on a regular basis, here's something that could change how you use it. I think it could change Twitter from something you use to talk to friends, to something you use to find friends.
Twitter Local lets you subscribe to any 'tweets' that come from a geographical area. Have a look and see if it works. In theory, and if people use right, you could find new anything from a place near you (news, people, services, etc).