as reported by Ed Brayton in The Michigan Messenger:
Longtime Ingham County Commissioner and Michigan political consultant Mark Grebner has filed a defamation lawsuit in Ingham County Circuit Court against three men for allegedly editing false and defamatory information into his biographical entry on Wikipedia.
The three defendants are Dennis Lennox, a Central Michigan University student who received a great deal of attention over the last few years for a string of politically-charged incidents on that campus and was elected Cheboygan County drain commissioner last year; Bradley Dennis, a member of the Michigan State University College Republicans who ran an unsuccessful campaign against Grebner for the Ingham County Commission last fall; and MSU sophomore Anthony Giammarinaro.
The three are accused of editing Grebner's Wikipedia entry to include information that Grebner, a Democrat, argues is false and libelous....
The lawsuit is not against Wikipedia itself, so there isn't any 47 U.S.C. § 230 problem. In many ways, it's a traditional libel lawsuit against the alleged authors of the libel. Still, it seems to be one of the first lawsuits filed against people who have written or edited Wikipedia entries, so I thought I'd note it. Many thanks to Jason Miller for the pointer.