I just tried it out and even if you don’t find all links which you can find in Technorati for example – Google uses here the „link:www.anysite.com“ search here-, this is pretty amazing and changing fundamentally the web experience.
At the same time you discover now a site and you know what others have to say about it. Pretty impressive. Interestingly Google seems to give me only comments aka blog posts from Switzerland.
Blogger Web Comments for Firefox is an extension that makes it easy to see what bloggers are saying about a page you’re viewing in Firefox and even make your own blog post about it, all without leaving the page you’re on.