As I have experience with illustration, I would be happy to redraw the occasional PNG file so that it's SVG instead. I sometimes may end up doing this because of other personal projects I'm doing, as I often find myself redrawing flags... I'm more than happy to share that work!
I've been a long time user of Wikipedia and have even contributed monetarily to the cause, but I have yet to be an active contributor beyond minor grammer/spelling corrections. This is mainly because I could never previously think of any significant way to contribute (I don't consider writing to be my strongest suit). Hopefully my skills with illustration can be of some use.
There seems to be a lot of etiquette and rules surrounding how things are done here, and while I try my best to be aware of it all and follow them to the best of my ability, I will probably screw up now and then. Please have mercy. ;-)