I do live in Los Angeles, where every 3rd person (or more) is writing some time of script. In the past, properly formatting your script required expensive software and a truckload of patience.
Celtx, an open source scriptwriting software, allows anyone to write their first great movie without spending hundreds of dollars. It supports all the usual features of scriptwriting software, as well as a collaboration service that allows 2 or more people to work on a script together.
Several of the Friends in Tech members recently used this to write our holiday special and I found that it worked very well. Even better, the typical script format times out to about 1 minute/page, so we were able to get on-going estimates of the length of the piece just by noting the number of pages.
Link: Celtx Scriptwriting Software