MyBB Community Forums

I've been searching for this for a while now, and I have yet to find something like this, I know that there are thread ratings, but I want my users to rate posts instead, here's what I'm thinking:

Two buttons (+ and -) appear somewhere on the post, when the user clicks them, it does an AJAX query along with its fancy loading image and the icons disappear, if the user reloads the page, they can change their rating for that post.

Here's a stupid animated example I made in photoshop:


Icons:




Edit:
Oh yeah, I totally forgot something, the ratings the post has got should be displayed on the left side of the actual rating system, along with a button that shows who rated, with AJAX again, of course.

There should also be a page that shows all the ratings the specified users has ever given and received.

And if it's not that hard, possibility to add more ratings than two?

I would do all this by myself, but since this requires things with MySQL and AJAX, I'm clueless.