Massively was contacted by Tristan Bacon, head of communications for Multiverse Foundation. He says that the company has acquired the source code and is "starting work full-time on the actual MMO creation platform." Bacon says that if there is still interest from fans, the team intends to use the platform to make a Firefly MMO.
Don't get overexcited at the prospect of saddling up for the 'verse in your own ship, however, as this might be as long a shot as it ever was. There are substantial obstacles to overcome, including permission to use the IP. Bacon also says that the current team is just a small group of volunteers working on it in their spare time, and would appreciate more developers to sign on to the project.