Google have another great tool in their ‘Beta’ box of delights.

 Late last year, Google released another great tool in Beta.
It’s called Blogger Web Comments. It’s currently only availableas an extension for those of us who have migrated from Microsoft Internet Explorer to Firefox (in fact, if you haven’t done so already, you should seriously consider looking at Firefox http://www.mozilla.com/firefox/).
Blogger Web Comments, pops up and shows

http://www.google.com/tools/firefox/webcomments/