Could whomever manages the MediaWiki settings allow for the following file types to be uploaded?
.EPS
.AI
.ZIP
I know you guys were hacked in the past, and so you may be somewhat gun shy about a .ZIP file being uploaded, so I could skip that one if needed, but .EPS and .AI files would be nice, especially for artwork projects. You guys might also want to develop a policy on using GH-themed artwork. It could be as simple as saying, "Use the artwork as you see fit, but any developed artwork should be free to use to the community." So, if someone makes GH-artwork that they use to make a hat, they should contribute that artwork back to the wiki.