The Office of Letter and Light who bring us NaNoWriMo now bring us Script Frenzy. The challenge is to write a 20,000 words screenplay or stage play in the 30 days of June. The website looks amazing and provides plenty of information about how to write a play.

If you're not up for writing a 50,000 words novel in June (SoCNoC) and want something a little shorter and different try Script Frenzy.