As I said a while ago, we're about to add charts and org charts support to FullerScreen (the viewer currently released as an extension to Firefox on, not the editor). That's done entirely in XBL and SVG, and the result is really impressive. It's really trivial to use : just create an HTML table, give it a class triggering an XBL, and done... See the two screenshots below. In the first one, we don't apply the binding. In the second one, we do. Lovely eh ?-)

without the binding with the binding

Mucho congrats to our colleague Olivier Gambier (aka dmp on IRC) for his hard work !