I noticed that there are some domain hacks that are available (particularly, mediawi.ki and media.wiki). Can you purchase the domain name mediawi.ki so that there is a 301 response code and to allow URL shortening for articles on Wikimedia? I checked who.is and that domain is not registered.
I don't think there's anything to do here. We have a shortener domain that's operational at the Traffic level in w.wiki. A proliferation of additional shortener domains is undesirable at this time from our end of things, and the current one is apparently still not yet in service anyways.