If you are reading this, please copy this to any other Wikia wikis that you are active on.
MediaWiki is the wiki software used by Wikipedia, Wikia, and WikiHow, among lots of other wikis and wiki hosts. Wikia is currently planning to replace the core structure of MediaWiki (including the editor) on all of their wikis with a proprietary program, making it MediaWiki in name and a handful of lines of code only.
Wikia is shooting themselves in the foot
Dozens of other wiki hosts, including Wikidot, Wikifoundry, and Wikispaces, use proprietary wiki software, but none of these sites are as successful as Wikia is. Wikia is mainly popular because it uses the MediaWiki software, which (in one form or another) is familiar to users of many other wikis. If Wikia actually implements the new software before next year (which I'm not sure that they will, considering how long the recent redesign took to implement), they WILL lose users.
What wiki admins should do
MOVE TO SHOUTWIKI OR EDITTHIS ASAP. WIKIA WILL FORCE THE NEW SOFTWARE DOWN YOUR THROAT IF YOU DON'T.
Wikia is effectively killing itself. Move your wiki to another host. #WikiaIsOverParty