Welcome to WebmasterWorld Guest from 22.214.171.124
Moderators: brotherhood of lan & mack
Have you had a look at Webmasterworld's social media tagging and bookmarking [webmasterworld.com] & community building and social networks [webmasterworld.com] forums?
They should give you a good idea of how other people are utilising traffic in the way you want to.
Las VegasOctober 6-8, 2015