Web2 video is all about meta-data

Stumble upon has implemented one of the best working models for sifting content and making it applicable to users Read some maths here

Whats the best web2 app for publicity and outreach, comparing Digg and Stumble upon here

The problem with all these copurate web2 apps is that you have no control over your data - the copuratein owns your data and generally you have no way to easily remove it/move it - they are walled gardens. MP3 here

Academic but interesting here