Hi. You and/or thenchick need to start a blog or forum post about new leadership for the wiki that the other contributors can see and comment on. Ideally, given the apparent size of the community you would include a vote (for/against). You can leave messages on users' talk pages to help them find it if it is not very visible.
I'd personally make a forum post. Adding a poll will make other want to adopt the wiki too. A simple "So-and-so and I would like to adopt this wiki. Please leave comments below with either a support or against." works. Merrystar just wants to make sure that the community on your wiki are aware of what is taking place and allow them to voice their opinion on the matter.