ORGuy, I also applied to NYU Stern's IOMS and haven't heard anything yet. Don't think anyone has yet. But as you said, there was nothing posted on the results search page for all of 2009, so who knows.
martizzle, I heard back from CMU (OM, not OR), and I think as with many small business school programs, they wait for their admits to make a decision, and if the admits turn down their offer they try to use those freed up slots to offer admissions to some more applicants, so even if you haven't heard back and others have, there should still be a chance of getting an admission in late March or early April.
By the way, doesn't anyone have an opinion on NYU Stern's OM program versus CMU Tepper's?