[eluser]Pascal Kriete[/eluser]
You mean attributes like inputmode and datalist? I'm not aware of any browser that supports them yet ... and it'll probably be a while. There are a few interesting things in the spec - particularly the structure ones (header, footer, section) and the media stuff. I've been watching css 3 more closely than html 5 though.
I suppose Webkit will get to a few more of them within the next year or so (if they stop adding so many of their own). IE 9 might actually include some of the css 3 stuff like corner-radius.
Essentialy - forgetaboutit. Even if Webkit and Gecko start supporting these; half the world is still on IE 6.
Javascript has the potential to save CSS 3, but HTML 5 is wishful thinking.