With the extension of the 100 Years celebration, I'm not expecting anything else of any significance in 2002, unless its for 2003 and starts towards the end of 2002.
Yes, the 100 Years Celebration is dragging on a bit, but to be fair, there were some outside factors that slowed the start of it back in October '01.
Still, I'm sure that if there wasn't still a bunch of 100 Years merchandise to sell, the celebration wouldn't have been extended.
The thing to keep in mind is that a big part of Disney's guests visit no more than once a year, and many every 2+ years, and they don't pay close attention to the goings on like we do. So to them, the celebrations don't drag at all.
Personally, I don't mind them, except when they take a great parade (ToN), and diminish it to fit the Celebration (ToD), and when they take the place of real attraction development. For the most part, the celebrations should be a side dish, not the meat.