Belle - Blogs vs other social media

I thought this table from Jeremiah Owyang - http://www.web-strategist.com/blog/2010/02/11/matrix-buzz-vs-facebook-vs-myspace-vs-twitter-feb-2009/ - is really helpful considering our conversations about how new web 2.0 technologies can be used by marketing professionals, particularly in light of Nicks questions about Facebooks effectiveness in relation to other mediums. (sorry i would have posted it on here but couldnt seem to get it to copy over in the table format)