Recently, I came across Return of Reckoning, a private server for Warhammer Online. As it turns out, Warhammer Online was shut down a year ago, so fans of it decided to create their own server, in order to continue to play it. Its coming along pretty well, with the first area unlocked and RvR working well.
Are there any other MMOs out there that have been shut down, but fans have brought it back?