This ABC News article provides nice coverage of Revver and some of the other companies using an ad revenue sharing model in the user generated video space:
http://www.abcnews.go.com/Technology/Story?id=3403460&page=1
It is interesting to see this more democratic revenue model emerge in contrast to the traditional model where content creators had to first prove significant value before receiving [...]

Interesting research about second tier video sites. There is plenty of room in the online video marketplace. I just don’t think there is going to be another YouTube any time soon.
http://www.centerformediaresearch.com/cfmr_brief.cfm?fnl=070706