Facebook + LinkedIn for Academia.
That's the pitch for Academia.edu.
Launched in September 2008, it is designed to keep in touch with peers/potential collaborators by creating a user profile with tags that are related to research. TechCrunch reports that academia.edu now has 137,000 registered users, has been growing by around 15,000 users a month, and gets over 600,000 unique visitors a month.
For fellow EdLabbe...