I tried Inkscape before and it wouldn't start. I tried for a bit to get it going and then went back to Illustrator. I'm on Mac. I've kept Illustrator 5.0 with the FXG output option.
Creating our own exporter for these programs sounds like a good idea if it's possible and incorporate our fixes and patches. What about an exporter that exports both SVG and FXG at the same time? BTW Is there a runtime FXG and SVG interpreter? Then both our FlexJS and Flex apps can pull in and use the same FXG or SVG for the visuals?