RS,
If you click the "Like" button it gives you this explanation...
"If a specific post was interesting or useful to you, we recommend that you Like that post. It tells the post author, and others, that you found the information valuable. Clicking Like is another way to let others know that you enjoy it without leaving a comment."
and below that is the option to actaully "like" the post AND, as you can see in your post, I have "liked" your post.
It's not really that great of a function, but many forums do it and it does allow someone to "like" the stuff you said without spending much effort to do so. It takes the place of me having to post back saying "I agree with RS".
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