I recently had to put together a wiki for the RapidSMS project and one of our goals was to make the content as similar to Sphinx documentation as possible. The idea was that as certain pages on the Wiki matured, they could easily be rolled into the official Sphinx docs, all without changing the actual format.
MoinMoin 1.9.3 actually supports Restructured Text as a markup, the same format as Sphinx, and it also support Pygments to do syntax highlighting, also the same as Sphinx, but the two didn't play well together: although you could create pages using RST, Pygments would not highlight code segments in them.
So I hacked on MoinMoin a bit to make it work. It isn't the prettiest of patches, but they rarely are. Here's a ReST page with some highlighting:
The next problem was that I wanted a slightly better editor for RST. I've used CodeMirror in the past and always thought it struck a nice balance of performance and functionality. Sadly, there wasn't an RST parser written for CodeMirror, so I threw a very rough one together.
You can choose to add just the Pygments highlighting to ReST or to also include the CodeMirror editor, up to you. Grab the gist and check out the README for installation instructions. It is slightly laborious, but mostly just copying files around. Hope you find it useful. You can check out the version we have running on the RapidSMS wiki.