He announced his resignation is effective on Nov 15. From what I've seen online:

If McGreevey were to resign before September 15, New Jersey would have a special gubernatorial election on November 2, 2004. If he were to resign after that date, Codey would hold the office until the end of McGreevey's term in January 2006.

So, instead of allowing voters to decide in November's general election, he postpones his resignation until after the 60 day deadline (indeed, after the election) so a Democrat can keep the seat. Gee, sounds like "disenfranchisement" to me.

There may also be concern about how a governor's election this year might influence the presidential election.