If you want it, Ask for it - Vote for SVG support in Internet Explorer

Microsoft maintains a site for feedback on their products, Internet Explorer included. There's a feedback item on the site where you can voice your desire to see SVG implemented in the most widely deployed web browser. The feedback item is here, but you need to get through a couple hoops to get to it. Namely you need to sign in with your MS Passport (same as for Hotmail or MSN) and register (again) with the Microsoft Connect site.

It's worth the effort to get some focus on this issue though. Get on there and let Microsoft know how important SVG is to you as a developer or as a user. I rated it a 5/5 and left the following note, which you can feel free to use for your own inspiration:

SVG is the most widely developed and most direct way to implement accessible vector graphics on the web. Complete built-in support of SVG will enable users to access a wide variety of web applications through Internet Explorer.