For a few more options to network or get the word out about what you're up to creatively, try JustTweetit and add your illustration site to the illustration list. (or whatever specific list your work applies to)
Another option to place a free online portfolio is Warmtoastcafe. Then of course, Twitter, Facebook, and Coroflot for another free portfolio option.
Another site to market handmade goods for free is 1000markets.com