Mike I would say the answer to your questions will be sooner rather than later.

Microsoft is working hand in hand with the HTML5 and CSS3 workgroups. This will be very important to MS as Windows 8 (or what ever it will be named) will be HTML5 and CSS3 on the new desktop. There is a developer edition available for download from MS if you have a spare machine to install it on. More of an Alpha edition rather than a Beta edition.