there's an article just out in the online Chronicle of Higher Education,
http://chronicle.com/subscribe/login?url=/weekly/v54/i08/08a00601.htm
"The Wiki Watcher Scanner catches colleges embellishing their online-encyclopedia entries
Boosters beware: An online database developed by Virgil Griffith, a graduate student at the California Institute of Technology, makes it easier than ever to catch self-interested parties polishing their own Wikipedia entries. Computer IP addresses serve as a kind of electronic signature. Mr. Griffith's WikiScanner correlates those addresses with the institution that owns the network, identifying who made changes in Wikipedia articles. Here is what users on some campuses edited in their own colleges' entries, misspellings and all. ..."
The full article is available only to subscribers. I'll be glad to email the descriptive listing to individuals, as permitted by the web site, but I can't fairly post it here.
some of it is polishing--others polishing only in the satyric sense of the usual undergraduate vandalism. None of it strikes me as a serious problem, and none is very recent.