Google SideWiki

Its one more 'provide-your-comments' application from Google. Sounds interesting but as pointed out by many, it may be another way of adding stuff about stuff on web.

Webmasters do NOT have an option to enable / disable this feature for their website, as of now. So, people can misuse to generate spam or write nonsense about a website and give a wrong impression. This becomes more dangerous because if you have a SideWiki enabled browser, comments are available right-away (if any, ofcourse) when you visit a webpage. One consolation is claiming a website on Google Webmasters Tools and projecting comments on SideWiki as Owner. This way, owners' comments will always appear at the top of others' comments on SideWiki.

As of now, it does not provide feeds which can be trapped and fed. But its possible to publish on Blogger and also to Share (after commenting) on Twitter, Facebook, etc. People are using round-about-way to create its feeds by publishing on a new invisible blog and taking feeds from that blog.

A con for its usage is, every webpage takes longer time to show up. The browser (I was using FF3.5.5 GTB6. GTB stands for Google Toolbar) hangs for good 3-5 secs. I disabled SideWiki, and it works fine.