call me skeptic but I can't envision MoinMoin+trac being used as a large scale CMS system (which means a deployment into a corporation, which means some corporate suit not "buying IBM" and risking losing his job)
It was not a large corporation. It was a large deployment in the sense of having many documents, many users, and many projects, and needing to handle an occasional slashdotting. Specifically, the site was SciPy.org and its many child sites, and it replaced the Zope CMS that it ran before...so, it turned out to be solved better by tools that didn't call themselves a CMS, but in fact its primary purpose was to manage a lot of content and make it editable by a lot of people. Sorry my use of the word "large" made you think "enterprise"...that wasn't my intention. I've rarely worked for or on large enterprise projects, as it isn't an area I find enjoyable. Turns out MoinMoin makes a pretty good CMS, because it doesn't try to be a CMS.