Scalable Vector Graphics (SVG) is a set of specifications based on XML and used to describe 2D vector graphics. The specification is an Open Standard developed by the World Wide Web Consortium. You can create SVG images from your 3D Scenes using 3DPaintBrush.
Advantages of having SVG content are :

• SVG images and their behaviours are defined in XML text files. This means they are Search Engine friendly.
• The image is lossless. Unlike other Raster Image formats ( JPG,BMP,PNG), SVG is a Vector format and can be scaled up to any size.
• Easily editable (using any Text Editor)
• Suited for compression

The main reason for the muted use of SVG content is the lack of proper support on Internet Explorer. You could overcome this issue by using SVG Web - a javascript library that provides SVG support to browsers. The library uses Flash for actual rendering. Majority of the users already have Flash installed. Give it a spin!