Ever wanted to write a novel, and by write I mean finish the first draft?
Found the NaNo sprint doesn't work for you?
Elizabeth Bear has started up a new LiveJournal community: Novel In 90. The idea is basic: your 90 days start when you sign up, and you write 3 manuscript pages a day. At the end of 90 days you should have 270 pages, or 67,500 words.
The community icon says it all, right? There's a whole slew of people signed up already. If it sounds good, get to it.