OK so there's no question that social networking is a huge deal. Recently, while setting up my own personal blog and joining Facebook, I thought hey, why not, instead of having to be "inside" a site, just link individual blogs with each other much like profiles inside Facebook? You could have the same plug-in-like apps and notifications but inter-blog. Well, turns out I'm not so original, it's already being worked on with Wordpress: http://gigaom.com/2007/12/11/the-next-social-network-wordpress/.