I should add a thicker border separating pages. Also to notice is that infinite scroll is entirely client-side, so no Javascript enabled browsers will just get the pagination as normally.
RSS, yeah, it needs one.
The dropdown moving into view is an experiment, and I'm just testing to see how it goes. My thinking was to scroll the readme into view, and scroll up a bit more to put the next element right under the mouse pointer. So if you try clicking somewhere below the middle of the screen (depending on the size of your screen), you can browse the entire list without using mousewheel or moving your mouse from position, and every readme will scroll to the position you are looking. This is especially helpful if you do a search for something and want to view all of this week's items. But if it turns out to be confusing I'll remove it.
Links with target _new and _blank isn't something I like too much, so I leave it to user choice if they want to middle click or normal click, which is what they're used to already.
The cart idea is interesting, and has some potential. I think it should be made to watch the repo on your account on github, so it'll probably require you to login with your github credentials. Also something for the future as I'm not ready to do logins yet.
The UI needs work.
You're probably right about the description as title I'll try that.