Pushnote - Web 3.0 ?
Basically, it allows you to discuss a webpage with other users who are currently on that webpage. I think steven fry owns a share of it, and he tweeted it out to his followers.
I dont think you can fully understand it until you try it! I didn't get it until I tried it, but the idea is growing on me, and I think it could go viral fairly quickly!
The link is below:
Pushnote
Online Business Training on How To Create Products to sell online Plus Lots More.