Sorry, DC rates don't come out till fall. I remember they came out on September 28 this past year - because I was in WDW when they were announced and was shockced to come home to see they were out.
Disney will release the seasons (value, etc) probably in June, that's when they did last year.
Figure that if you are booking, that room rates will go up about 5%-10% (but maybe not with the economy) and you will get 20% off value resorts, 15% off mods and 10% off deluxes and you will have a ball park figure to work with.
In terms of booking, I always book as soon as I know when I am going and apply discounts to the ressie when they come out. Then I know I have the room I want. But January is also a slower time of year. February though can be busier, especially President's week and after.