In an effort to help increase transparency and communication in the Nation's Capital, the National Journal Group is launching 3121, a social network and directory for people that work on Capitol Hill. If you have a valid Senate or House Committee email you can request a beta invite. The site was designed by DC interactive agency Jess3.
Social Times just called 3121, "LinkedIn for Congress Members" and I think they nailed it. This could become a very useful tool for anyone working on the Hill. The hope is that it helps communication and collaborative efforts between congressional members and staff. The official launch will be in September, but until then you can follow the 3121 blog for updates.