The American Institute of Physics just launched their version of facebook for Physicists: UniPHY. If you are a physicist and have published at least 2 papers with AIP, UniPHY has already generated a profile page for you including links to your work (exported from the Searchable Physics Information Notices database). According to the upbeat marketing video, this will be an easier method to discover and connect with scientists doing similar work.
More at: http://www.aipuniphy.org/Portal/Portal.aspx
[Thanks, Jeanine!]
