With Sidewiki, Google is opening up a new channel for user generated content (UGC). Users are empowered to comment on anything. I'm not sure if I'd want to see those comments all the time, but I know that it could help restore balance to one sided, biassed content. I'm really interested to see how Sidewiki interacts with highly branded content. The seller's marketing message can now be critiqued by anyone and those opinions shared in a truly egalitarian fashion.

I'm really hoping this product evolves into a more live/visual demonstration of user collaboration like Free Range Feedback. I want to be bouncing thoughts of other users, to see where the most active user community is and working collaboratively to generate and explore ideas.