"Babble on about your NaNoWriMo experiences." OK.
Done it and won it three years running now. Plan to do it again this year. Of the three 50K-word drafts, the latest is mellowing on ZIP drive and the other two are in various stages of revision.
I totally recommend it, especially if you've never done it before. Of course, if you want it to be a productive, fulfilling experience, it's best to approach it with a publishable book in mind. Not that the book will be publishable by the end of November, of course; but if by Dec 1 you have a draft of a story that could, with sufficient revision, turn into something you'd submit to an agent, that's a lot more useful than if you got to 50K by refusing to use contractions, making people say things twice, and transcribing your characters' sing-along-with-the-80s sessions.
I also totally recommend poking your head into your regional forum once or twice a week at least. I think NaNoWriMo works so well because it isn't just a deadline; it's a deadline with a support structure. You can keep in touch with others who are trying to meet the same 50K goal, egg 'em on, drop in on the forum for a midnight marathon, whatever. Writing is mainly a solitary act, true, but there are ways in which it can be made less solitary. I got a lot of writing done at group write-ins.
Having done this a few times, I've finally figured out that I'm an outlining novelist, and not the other kind. Go me. The second year, I started with a premise and not much else, and found out that it was hell. Whenever I got stuck, I had no escape route. I couldn't skip ahead and write later chapters because I hadn't yet written the chapters that would inform those later chapters. I'm now editing the novel, and realizing that I didn't know my characters well at all in the first draft. Getting to know them better and imposing a chapter outline on the thing is making the rewrite finally happen. The third year, I had more of a structure ready to go, so I was able to bounce around wherever the day's inspiration took me, and the novel sort of grew like mold spores, radiating out from various points until a complete blanket of fuzz covered the used-to-been bare bones. Yum. Mold fuzz. Anyway.
The first year, though, it was a total surprise to me that I
could write a novel. I thought I was a short story gal and nothing else. Now, my short story ideas have a tendency to turn
into novels. What a difference November makes, right?
Er. Well. Yeah. I hope this was helpful for someoneortwo. Or at least amusing. In sum: Go go go go nanowrimo! Muahahaha.