I also found my bandmates with kijiji. I actually found a lot of jams partners with kijiji before finding the right ones to form a band. Like Razbo mentionned, its Canadian thing but there as to be a similar websites for Usa. There's a 2 websites I heard of I cant remember where or when. Maybe you could check that out.

http://www.joinmyband.co.uk/
http://bandlink.com/