Are you considering giving Scrivener a try while you're writing your entry for NaNoWriMo 2009? You're in luck! Normally, the application comes with a 30-day free trial. While that's long enough to last through the 30 days of writing ecstasy that it NaNoWriMo, you should get to know the tools of your trade before you start writing. Downloading the trial version of Scrivener between now and the start of NaNoWriMo on November 1st gives you a trial version that lasts until December 7th, long enough for you to not only finish your tome, but also make your first editing pass before sending it to your publisher.
Now here comes the really fun part -- if you are successful in writing your 50,000 words by November 30th, you can buy Scrivener starting on December 2nd at a 50% discount off the normal license price of US$39.95. Those who run out of luck or time and aren't NaNoWriMo finishers can still get 20% off by using the promo code NANOWRIMO.
If you'd like to be able to take notes in between writing sessions, you'll be happy to know that WriteRoom notes can be synced to SimpleText.ws, and then imported directly into Scrivener.
Thanks to Cthulu Saves and sophielynette for the tip!