Yes I think we do as IE9 is in beta and supports a lot of the commonly supported HTML 5 tags as well as some CSS 3. Video and audio are the two main ones along with the new input attributes I mentioned. Then HTML 5 supports just using <!DOCTYPE html> so that will need adding to the list along with the fact HTML 5 only requires <script> and <style> without the type attribute as it will treat anything in these tags as JavaScript and CSS respectively unless the type attribute is present and says otherwise.
Then we have the CSS3 stuff but the issue with a lot of it is WebKit and Mozilla insisting on using prefixs for them in the form of -webkit- and -moz- which makes life difficult all round. But yeah we need to add border-radius and support for css transitions etc. -- Carbonize <http://forum.pspad.com/read.php?2,52056,54950> PSPad freeware editor http://www.pspad.com
