If you're super hungry: Heidi's down in the Regional Jet facility on B Concourse (around gate B92ish)
AMAZING sandwiches (I'm a sucker for the Hell's Kitchen, but it's enough to feed me for two days lunch...)
I think my second choice would be the Chophouse Restaurant in the Center Core of A Concourse, Northeast side.
My third choice would be Wolfgang Pucks on the Mezzanine level of B Concourse.
Gimme a call 720-210-7931, and we'll #HIRL (Hangout in Real Life) for a bit!