We are considering that week as well (Dec 2-8). Many Disney planning books and posts have remarked that this is a good time to go.

It may be a little cool and its after Hurricane season. This is what I have learned so far:
Early December is Value Season and right after Thanksgiving so it is normally not as crowded as many other times of the year. The Unofficial Guide (which I recommend) has attendance at the MK at 25K/day in early Dec. as opposed to 60K/day at Thanksgiving. Ask specifically about any promotions or discounts they might have at this time.
It is an excellent time to catch all the Christmas Events and not have to deal with the Christmas crowds:
Mickey's Very Magical Christmas Parade @MK,
Osbourne Family of Lights @MGM,
Holidays Around the World, Lights of Winter and Candlelight Processional @Epcot,
Festival of the Seasons@DTD,
Mickey's Jammin Jungle Parade @ AK
Plus several resorts get decked out in holiday style.
There are the Pop Warner Football and Cheerleading Championships @ Disney Sports Complex and the participants/parents/families/chaperones will be staying at the All Star, Pop Century and CBR. (IMHO, I don't believe they will make a big impact during the day due to the games, competitions and ceremonial events, nights might be different - only an opinion.)
DVC and its members will have their annual meeting - I have no idea if that draws any. I'm sure ther are other events (Mousefest,etc.) that will be at WDW but this is all I've come across so far.
LOL and keep on reading the DIS boards.
