Who knows? I guess that people have moved on. I check in once in a while and try to respond if there has been a post even if I don't have a whole lot to say. I don't know what to do to revive it, though. I miss it, too.
Edited to add: I got a whole lot of PHP error messages when I posted. I got some the last time I searched, too. I guess that none of the mods or admins are even checking in.