I was browsing CMO.com a few days and I found a really great chart describing the pros and cons of several high profile social networking sites. It’s a great chart to get you started using these sites to help advertise your site. One thing the chart does not mention is using these sites as places to put banner ads on. Due to the nature of many of these sites, they contain tons of consumer information that you can use to pinpoint target for your ads.
http://www.cmo.com/social-media/cmos-guide-social-media-landscape

