At day 11th, I've written 22,300 words (+44%) which I'd say it's pretty good.
Besides, I'm really enjoying writing the book, I'm loving the plot, the characters, and writing it in Galician!
As an interesting note, last week already sprouted an unexpected new character! Little buggers, hehe... :-)
An aditional benefit this year (besides the fun) is that I don't have to carry around a big, heavy bad of documentation books... :-P
Anyway, how's your NaNoWriMo going?