Brought to you by the same fine folks who run the NaNoWriMo event each November, Script Frenzy is the "Screenplays, stage plays, TV shows, short films, and graphic novels" version of that challenge. It starts at midnight on April 1st and ends at midnight on April 30th. To put it simply, your task is to produce "100 pages of original scripted material in 30 days." Quite a reasonable goal, in my opinion.
Their website is full of helpful info on formatting, outlining, and a lot of other things relating to scripts so go over and check it out.
As I've mentioned before about NaNoWriMo, deadlines are a great personal motivator so I decided to give it a shot this year. Care to join me?