Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Bernd Ploderer, Steve Howard, Peter Thomas. Collaboration on Social Network Sites: Amateurs, Professionals and Celebrities. Computer Supported Cooperative Work, 19(5):419-455, 2010. [doi]