I recently checked it out on YouTube and it appears to be an interesting and useful serious site for getting considerable insight and connections to many researchers in very specific areas such as, for example, multivariate music (which in my case is vector valued music obtained by converting MIDI data to matrix form) which, from use of the SAS statistics software package, can be studied in some very detailed and interesting ways....which I have done over the years!! Really fun and informative research that led to several publications over the years. So I think Academic.edu just might put me in touch with numerous others that may have done work on multivariate music via MIDI data!!
Cecil