While still in alpha (mind you) it is a promising progress on a very cool firmware hack. In short, it is a non-destructive and non-persistent (ie it does not replace the pre-existing firmware) firmware replacement that allows for far more features than the original Canon firmware.

There is a long list of cool features on their site, and it caters not only to cinematographers but has plenty of features useful in still photography as well.

Plus, it's a cool hack, which has value in itself :)