It's not a Facebook rival; rather, it's designed around sharing Web content pulled from Bing searches, and now anyone can check out the social network project brewing from Microsoft Research.



From PCWorld:

Microsoft's social networking experiment, So.cl, a site designed around sharing Web content pulled from Bing searches, is now available for all users. Launched in December and aimed at students, So.cl is not meant to compete with popular social networks such as Facebook, Google+, and Twitter. So.cl isn't a place to connect with friends and share moments from your lives.

  Microsoft's So.cl: A Brief Tour