Can I say why I'm not doing it?
I think Nano is a great idea, but it's not for me. Here's why:
1) I have no problem finishing a first draft. It's the edits that kill me. I'd rather take a little more time, plan a little ahead, and not rush the first draft and hopefully save myself a dozen rewrites.
2) I have no problem churning out words when necessary.
3) All of my novels end up around 100K, which I'm happy with. Based on my writing speed, the most I'd be able to crank out in one month is 50K.
4) I know what projects I'm working on now and I know what I'll be doing next. Taking a whole month out of that schedule to write something rushed-- to me, that feels like a waste of time.