You can get friends and family to sponsor your novel-writing month through Firstgiving.com. All proceeds from sponsorships go to NaNoWriMo's parent 501(c)(3) nonprofit, the Office of Letters and Light to pay for this year's Young Writers Program and adult main program.Cool, right? Then I went over to firstgiving.com to see how this sponsorship thing works, and got one page into the signup process before hitting disappointment.
Now, I've talked about online donation services in the past, and I don't want to get any more hate mail than necessary. So let me just quote part of firstgiving.com's Terms and Conditions (my emphasis below):
So please, if you're thinking of giving any money to NaNoWriMo, just write them a check. It'll only cost you a postage stamp and an envelope, and they'll get every cent of what you donate. And don't forget, it's tax deductible.