Microsoft announced that IE9 will support a subset of SVG. They’ve even done a video about it: IE9 SVG Video
The IE9 developer preview already manages to pass just over 28% of the SVG test suite according to codedread’s SVG support table
So congratulations are in order for joining in and getting going. There’s more to come to according to this as markers, clipping and masking are all things to look forward to.