Lea Verou publishes some really great stuff. Her latest work is Animatable. A tool to showcase the variety of things you can do with CSS3 animations. And it’s awesome.
Some weeks ago I had this article about rotating images like I use in the footer of this page. There is an animation in Lea’s demos that makes use of the same properties.
You will find some nice cutting edge CSS3-techniques in the demos so make sure to check out the source-code on GitHub. You can also contribute and check in a pull request if you want to.
Edit: And by the way… Lea writes about her idea :)