I agree with Bill.
This Dealer Fair is probably for more information and marketing on this years products.
I expect to find prices announced for the Gameboy Micro and more online information about the DS, but nothing about the Revolution.
Think about it. If Nintendo is launching Revolution in November then its crazy to announce anything now.
If they are launching it next Summer then dealer won't need to know anything until after Christmas. Dealers need to know what the marketing and products are going to be for this Christmas not anything after.