THE ITC HAS SEEN A VERY SUCCESSFUL DAY AS NEARLY 25% OF ITS FLOORS ARE NOW OCCUPIED BY TENANTS RANGING FROM BUSINESSES TO LAW FIRMS TO CONDOS. THE ESTIMATED WORKER COUNT AT THE COMPLEX IS NOW ESTIMATED AT 15,000. IN OTHER NEWS, ONAN CO'BRIEN WILL BE RENTING THE NORMALLY RESTRICTED TOP OF THE NORTH TOWER FROM TOMORROW TO SUNDAY TO HOST HIS SHOWS UP THERE FOR A BIT