Thanks to the work of Anthony Martinez the CSS3 to SVG Converter has had a major update to version 0.95.  He added a bunch of great features and functionality to the script, including the new multiple background syntax, base64 data for IE9, and he got the preview working in more browsers.

There is also now an official GitHub repository for this project and Anthony set up a JSFiddle if you would like to, you know, fiddle with it.  More details: