I often consider this, but the truth is that I really dont know. It seems that there could be some potential in trying to create a personality on the web for a company. I reckon sites like facebook are not client or business based rather for personal networking… However, I always think about the news feeds and what kind of marketing potential that could provide? Sites like the latter, myspace, youtube, twitter, flikr etc… (there are loads of them) basically free for all to join membership, create a profil, get a friend, pictures, videos (not forums or blogs) sometimes gives back links and page mentions which helps SEO.
Imagine you’re a designer or web dude… create a profile all over these sites … get a lot of friends, followers, good hits on the video or pictures… ? suppose you could get some business if you worked really hard and long trying to network this way. However, I have not really attempted this, so I dont really know.