Two months before the opening ceremonies, NBC Universal says it still has about 10 percent of its pricey ad inventory to sell for its coverage of the 2004 Olympic Games in Athens, Greece. The peacock
network has set a goal of more than $1 billion in advertising sales for the games, which will span 1,210 hours of coverage between Aug.13 and 29 on flagship NBC, as well as its cable channels MSNBC,
CNBC, Bravo, USA Network and Telemundo.