Gizmodo had a post on an HTML5 experimental page from 9Elements design studio. If you have Firefox 3.5, Safari 4 or latest Chrome build you can check it out yourself here.
I hope that we see more and more people taking advantage of HTML5. Internet Explorer currently supports only a small subset of HTML5 spec and none of it is for something like this. But if there’s enough push for HTML5, hopefully either the other browsers will leave IE completely in the dust and people will just stop using it (one can always dream), or Microsoft will wiseup and implement proper standards and HTML5 support into IE.