When The Party's Over . . . You've built your business on millennium madness. Good for you! But what happens when the ball drops over Times Square? Don't let your business become last century's news.

Giddiness and high times are now the story at all the companiesthat make and sell "official" millennial gear.

From countdown clocks to "Last of the Millennium"T-shirts, merchandise is flying off the shelves as consumersprepare themselves to commemorate a truly unique event.

But in the midst of all the celebration, one ugly thought nagsbusiness owners: "Who's going to want amillennium-anything on January 2?" says Budd Goldman, 52,owner of Countdown Clocks International in Mineola, New York."When this party is over, there will be a very empty feelingamong millennium merchandisers."