The National Journal is developing a social networking site akin to LinkedIn for congressional employees with house.gov and senate.gov e-mail addresses. The site is in private beta for now, but Adam Ostrow at Mashable got a sneek peak at it.
3121 will be pre-populated with basic biographical and job information for many employees (think aides, advisors, policy directors, etc), but then let users claim their profile and keep it updated. That information will be searchable, and users will be able to connect with eachother to establish a network on the site. Based on your connections, 3121 will also recommend other members you should connect with by looking at things like mutual friendships, a feature you’re probably familiar with from LinkedIn or Facebook.