I've been working on creating diagrams for the playing arenas of various sports (for instance see http://www.wikipedia.org/wiki/Australian_rules_football), using sodipodi (an SVG editor) and then exporting to PNG.
It seems to me that it would be useful for the purposes of future editing if people had access to my SVG files. At the moment, if people want to change the diagram they either have to ask me to make the changes, mail me for a copy of the SVG, or try the hack of modifying the exported bitmap on the site.
Obviously, I could upload the SVG source, but is this appropriate (we don't do this for any other type of file because of the bandwidth and storage issues) but where would be an appropriate place to put it?
So, basically, I'm raising the topic of whether and how we should handle "source files" for media we place in the Wikipedia.