Though as of now, I am not able to figure out, how to use the same. Anyone aware of it, who can share more insight on it.
Update from Blogger Status
Wednesday, May 07, 2008
Some users may be seeing star ratings on their posts without having opted in to this new feature. This is an experimental feature that was accidentally enabled on some users' blogs. We're currently working to remove star ratings on all affected blogs. In the future, you'll be able to choose to opt-in to this feature; it won't appear automatically.
Update: The Star Rating feature has been disabled for the moment.
Posted by Siobhan at 18:35 PDT