HYPE Das the biggest, the best, and the most successful, the Atlanta Games fell short on many fronts, except err-ant commercialism. Determined that the Games would be funded entirely by corporate sources, rather than the government, this year's Olympics taught the Americans that there's a flip side to relying solely on the private sector. They are feeling shortchanged, not just by security lapses and the shoddy TV coverage, but also by the mammoth traffic snarl-ups and the inability of the public to use anything but the MARTA subway, already groaning under traffic overload and human gridlock.