Well even as recently as 6 months ago, Brad had mentioned Galactic Federations as something he would've liked to do--although even then, it probably would be at least a couple years before it was actually made. While it's certainly possible I only imagined he said that, I'm still pretty sure he made mention of it earlier this year.
Of course, even if he did say as much (and that I'm not imagining it), it doesn't mean he's still planning/hoping to make "GalFed". With all the projects Stardock is either currently working on and/or has planned for the future--Dark Avatar, Society, Political Machine 2008, and the as-yet unnamed TBS 4x fantasy strategy game (and that's only the titles I can think of off the top of my head)--I just don't see how our friends in Michigan will possibly have the time and/or resources to develop a GalCiv RTS.
I would love to be wrong, however.