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The first Script Frenzy took place in June 2007 under Program Director Kristina Malsberger , during which participants aimed to write 20,000 words of a screenplay or stage play. Unlike NaNoWriMo, participants were allowed to write with a partner; like NaNoWriMo, beginning with previously written works was forbidden.
The next year the event was moved to April, and Jennifer Arzt took over as program director. The format of the event was also changed: all scripts were allowed, including those based on previous works, and the goal changed from 20,000 words to 100 pages. These rules remain in place to this day. Under Jennifer, the event grew from about 8k participants in 07 and 08 to about 12k in 2009 to over 21,000 participants in 2010.
In January 2011 Sandra Salas replaced Jennifer Arzt as the Script Frenzy program director, who left to direct her own screenplay. Unfortunately, while Sandra helped set a record for SF winners in 2011, she failed to do so in 2012, and saw a participant decrease in Script Frenzy in both 2011 and 2012. The SF 2012 participant total was 16,358, third place for most SF participants. It was about 75.5% of the 2010 record of 21,666 and about 85.1% of the second place total of 19,221 from SF 2011.
After a record-breaking amount of fundraising ($1.026 Million) in NaNo 2012, SF was integrated into the Camp NaNoWriMo event starting in April 2013, with the arrival of flexible word count goals and scripts as a genre option entering camp to accomodate the scripting option. Staff have said that other SF features, such as the PDF Validator and page count goals, will be integrated into camp if the scripting interest remains.  Despite the existence of petitions, the return of SF to its former 'seperate-event' status is highly unlikely at this time.
Script Frenzy writers started from scratch on 1 April. They could write alone or with one partner to reach the 100 page goal. They could also do as much planning as they like before the start of April but were not allowed to start writing before the beginning of the month. No scriptwriting experience was necessary to participate in Script Frenzy, as the site provided resources to learn the basics before the challenge begins.
SF's Forums were similar to NaNo's, except they lacked certain sections, namely age groups and roleplaying, created confusion over whether a script type lounge or genre lounge was best for a topic, and were sometimes criticized for having two+ boards for basically the same thing. The Post-Event boards were much like NaNo's, except for the existence of a highly unpopular deadlines board.
The Forums had medium-level activity during most Frenzy's, but was activer than usual in 2010 and less active than usual in 2012. However, the forums often experienced low or very low activity during the off-season, and a connected community like that of NaNo never truly came to be.