Zhura has been around for a couple of years now. But it doesn't seem to have caught the imagination or moved on too far. It is an online scriptwriting tool. So, like Final Draft, it does your layout for you. But your script is kept online so you can access it from any web PC in the world and it also allows you to collaborate on the script with other writers.
All good features! In short - a screenplay specific version of GoogleDocs.
So why hasn't it caught on more then? My take on it is that script writing is a very solitary, unsharing type of writing. Even if you write with a partner you tend to do it behind closed doors. The film / tv making stage, when you get to it, is such a team effort - everyone gets involved. So the writing is THE time to just get your head down and work privately, consider ideas and battle cliches.
Having said all that - consider the benefits of using a tool like this if you had a writer, a co-writer, a producer and a development person having to work to a tight deadline.
But then also consider the chaos.
So the jury is out for me. And I guess for others too. If anyone has used this (or similar) websites to write a script then leave a comment. Personally I have only used such tools for pitch documents and other supplementary materials.