I will be participating in NaNo this year. If you're a writer but unfamiliar with the term, you may want to visit the official site. Basically, in one month's time you're supposed to produce 50K on a new story.
I've signed up for the last two years and failed miserably. Won't stop me from trying again, though.
If you want to keep track of my progress (or lack there-of), visit my NaNo blog. I've already started updating it with pre-writing goals and the like.