Infinite scrolling Habra

On some sites, I saw the function of loading the body of the site as it scrolls down. And, not finding a single mention of the use of such a function on the habr, I decided to write my own version of user scripts under Greasmonkey , and at the same time touch jQuery.
While there are some non-critical flaws, but in general it works stably when viewing message feeds (for which it was actually developed). I would like to see feedback, suggestions and comments.

/ upd 2010-04-27 :
[+] folding / unfolding footer;
[*] upload comments in habracenter
[*] uploading the list of people in Habra / people.