SVG
From Friend2Friend Wiki
SVG (Scalable Vector Graphics) is the W3C standard for vector graphics, which are not only scalable (i.e. look good at any resolution), they are also XML documents. Maybe not yet supported by IE (?) but they are the way to go, and very easy to knock up in Inkscape.
Relevance to F2F
The F2F module's resource for showing graphics is the image, which has to be in SVG. This is a touch restrictive at present, since although SVG specification supports animation, browsers do have support for this yet.
Currently, the only SVG used are statically, hand crafted ones. However, since they are XML documents, it should be relatively easy to create them dynamically.
References
- W3C SVG Homepage
- Wikipedia SVG Page
- Inkscape, a good SVG Editor
- http://OpenClipArt.org, >30,000 Free SVGs