Something like this is desperately needed, keep up the work. One thing that I immediately noticed is that all downloads are named "download.svg". A more descriptive name would be helpful.

Edit: Also, copying the SVGs to the clipboard would be nice. Download from the browser still sucks, and with web based SVG editors (like my own one, www.hyvector.com ) people can quickly edit the generated SVGs without having to go through the downloading and uploading process.