(well more for profit than fun obviously)
Last night Greg and I had Graywolf on SEO Rockstars with us and he laid it out about gaming digg and myspace with some scripts, multiple accounts and some creative thinking. It was a very interesting show. At the end of the day any social network that controls the kind of traffic that digg, myspace, squidoo, etc control is going to be a target of spammers and automation (that’s the profit part).
Head over to WebmasterRadio.FM and grab the archive of show. It’s a good listen.