CELTX is this really cool cross platform screenwriting program. Part of what makes it cool is it's open source. It's built on top of firefox. It has a server function where you can basically pick up the script anywhere, or collaborate with anyone.
I really don't have the time to start setting up a scratchbox environment. Is anyone out there willing to give a shot at compiling it for N800? The source is available at www.celtx.com.
I second this. I have been looking at using this program for some short multimedia projects and it seems like it would be perfect for portable use to be on site and mobile with all your information.