WOOS.at is an app that shows you who else is where you are, and why they might be interesting to you
WOOS.at connects to your Foursquare and your Twitter accounts, and gets a list of people checked into the same venue as you. Optionally, you can browse trending Venues in your city.
It then lists the people in the venue by Peerindex score, and shows the topics they talk about, as well as their Twitter Bio's.
It allows you to know who to speak to at the next big conference, at the airport, or just at your local pub.