Stumbled across this site with a list of language-learning sites for many languages, not Russian only:
Vote for your favorite Language Learning Blog 2012 - Lexiophiles
Checked out these two for Russian:
Not for beginners --
Russificate
Language school with some online content (I went to this school for one month in 2003) --
Learn Russian at Moscow Russian Language Center | Ruslanguage.ru
