I respect the principle of Wiki completely, but I'd still be in favour of getting whatever controls we need in place early. But as was already said, if the sysadmins are happy, so am I :-)
One thing though: call me paranoid, but what is the advantage of showing changer IPs to all registered users (in the link titles on the Recent Changes page)? Is there a differentiation of permissions that can keep them from folks who just wandered in off the street? I don't suppose a poster's IP is particularly valuable, but in principle visitors shouldn't get what they don't need.
Another equally small issue: are the angle quote marks ('raquo') in the page trail a common feature of wikis? Lots of CMSs and things use them for a hierarchical list of ancestor pages, so there might be some confusion to avoid by sticking 'Your recent page views:' or something on the beginning of that line.