Facebook and Google Reader have a nice feature - a "like" button. Using it, the reader may quickly say that he liked the post, without bothering to write a whole comment.
Is there anything like it built-in directly into WordPress?
(I understand the different between .com and .org. I am asking about .com, but if you are familiar with a plugin for .org that does it, it would be interesting, too.)
The blog I need help with is haharoni.wordpress.com.