Here's one for you!
https://m1.buysub.com/cgi-bin/ncommerce3/ProductDisplay?prrfnbr=175824&prmenbr=13509&prcgnbr=21906
it does not seem to be online anymore.
Hopefullly someone south of the border subscribes and you can get yourself a copy. Its a pretty good article and very recent, with entries on lavalife and friendster, if I recall.
BERNiE
Bernie Hogan
Department of Sociology
NetLab, Knowledge Meida Design Institute
University of Toronto
bernie.hogan@utoronto.ca
http://edublog.com/hogan/