This just crossed my computer. I can't explain why NBC chose this particular week to do it, but then again, it's hard to explain anything they do anymore.
Deal or No Deal's "Overkill Week" (my name for it) will be the week of December 10th (6 hours in 5 days):
Monday Dec 10: DOND airs 2 separate hours at 8 and again at 10PM
Tuesday Dec 11: Another one hour Deal at 9PM (the usual time & day).
Wednesday Dec 12: A 2-hour Deal from 8-10PM
Friday December 14: The other normal airing of Deal at 8PM.