Can Someone tell me what the Links to Post business is all about?

Not that I have an issue with it, or anything, but whenever I make a post, I start collecting all these Links To, which show up at the end of the comments string. Mostly from Jeff's Gameblog, but others start showing up as well. Are the bloggers in question making the links? Someone else? Is it a search engine thing?

A quick google search gave me this:

Backlinks enable you to keep track of other pages on the web that link to your posts. For instance, suppose Alice writes a blog entry that Bob finds interesting. Bob then goes to his own blog and writes a post of his own about it, linking back to Alice's original post. Now Alice's post will automatically show that Bob has linked to it, and it will provide a short snippet of his text and a link to his post. What it all works out to is a way of expanding the comment feature such that related discussions on other sites can be included along with the regular comments on a post.

So, that sounds like another blogger is mentioning my post and google is automatically inserting a link to said post. Except, I don't think that's what's happening. I haven't noticed Jeff, et al, talking about me that much.

Again, I don't mind if Jeff, Norman, etc. don't, but I am curious as to wtf.