I actually do have StatCounter installed. I can see the stats myself, though it's not visible to anyone else. At one point, I was displaying the total number of unique visitors in a running total (also through StatCounter) but as time went on, I kept running into post after post about how showing the user count doesn't convince the users of much, and tends to clutter the user interface. So I removed it.
If I add it back in (and I think I could be convinced to do so) I would prefer to find a way that most people won't notice it unless they go looking for it. Something somewhat subtle. As an example, it might be cool to have a Stats tab on each page that exposes this type of stuff.
One of the catches with any sort of changes on this site is that I'm somewhat restricted by Wikidot. I'm using their framework, and I don't have the ability to go beyond what they provide. (I've actually built a C# binding to their XML-RPC based API that allows me to programmatically do some really cool things that Wikidot doesn't easily support natively like the headers on the Mercurial tutorials, but I'm still limited to what Wikidot exposes.)
That doesn't mean you shouldn't submit suggestions like this, but it does mean that not all suggestions are even possible without Wikidot doing it. (And whenever I see interesting suggestions that I can't do because of Wikidot, I consider, once again, if I should move off of it and just use my own site, custom built from scratch, or using a much less restrictive framework.)