Language Learning and Social Skills are important, too -- MyLanguageExchange is an important site for connecting to other cultures

http://www.mylanguageexchange.com/

If you are interested in promoting skills in students, then BIBPenpals and http://www.mylanguageexchange.com/ are places to visit.   Look at this helpful menu.

I recommend this system for finding people to interact with (in addition to Facebook and Skype).