To download the Technicolor CineStyle profile for your Canon DSLR check the link below. If you don't know what this is good for check the other link which will redirect you to Philip Bloom's website with some comparison screen shots and more information. Basically this profile increases the dynamic range of your camera which will give you much more possibilities in post production. A must have if you're filming with your DLSR.
link to Mr. Bloom's post
Here's a litte demo video that I found on vimeo which demonstrates how the new picture style increases the dynamic range of your DSLR. I think it works pretty well, but check it by yourself.