Nope. NFL network doesn't have it either. I have no idea why, but it is annoying as hell. Switching from a full game on CBS or Fox, I get blasted by the stereo sound. Pretty annoying if you ask me.
I mean, the original games are all 5.1, so why is it so hard to just pass that along? And why doesn't the NFL network itself have 5.1? Oh well. Excuse me while I go lower the volume to switch to the RedZone (which I still love, btw).