Microsoft's Test Drive http://ie.microsoft.com/testdrive/Default.html has a sample of what will be in Internet Explorer 9. Included under the Graphics Demo are a couple of SVG demos including animated SVG. Play SVG Asteroids in your browser. It works for me in Firefox. IE9 will use the GPU so things should be faster.
Noticed while reading http://www.theregister.co.uk/2010/03/16/internet_explorer_unveiling/

It is not clear to me when IE9 will be available for general public use or when it will be commonly used by current IE users. Some users seem never to upgrade their browser.

Better IE9 SVG article at http://arstechnica.com/microsoft/news/2010/03/platform-preview-gives-web-developers-first-taste-of-ie9.ars/

This is great news. I honestly didn't think MS would ever support an open standard like SVG unless some big content providers were excluding IE because of it. I don't think SVG has yet to grab too much traction, so its great MS have included support anyway. Let's watch how much more popular Inkscape becomes now.

I'm using IE8 and always upgrade my browser -- it's a security issue, if nothing else. Anyway, when I visited the MS test drive site, the "SVG-oids" item under Graphics, is grayed out, unclickable. (Several other items are grayed out in all 3 categories.)

IE8 doesn't support SVG natively yet. IE9 won't be released officially for quite sometime. If you want to test it, you need download the "preview" version linked from the top of article in the second post.

It's worth noting that while this is a great step forward for SVG use on the web, IE9's implementation is not going to include SMIL, SVG Fonts or filters.

SMIL probably isn't that much of a concern for us, as Inkscape doesn't currently offer any UI for creating SMIL animations. Ironically this comes just at the point that the Firefox developers are planning to enable SMIL by default.

SVG fonts are supported (for creation) in Inkscape 0.47. I think there were plans for more support in 0.48, but I don't know how far that's got. Since Firefox doesn't support them either, however, their omission probably isn't the end of the world as they've never been available in all the main non-IE browsers anyway.

But it's filters that I think are the real problem here. Inkscape does have a UI for filters - and a pretty good set of default filters just a couple of mouse clicks away. Any drawings which use these won't render correctly in IE9. Although they've listed filters as being unimplemented in IE9, I wouldn't be at all surprised if the gaussian blur filter does get implemented, as it's so widely used - but that's just speculation on my part.


So definitely a huge step forward... but still a little way to go.

iE9 will work on Vista/7 only, no backport to XP/2000 from MS. Next version of Wine will reimplement it entirely for all others OSs.