There's another vidoc been added to Bungie.net here, it features details about the saved films functions and Forge in Halo 3. There's also a saved films text tutorial at that link. With 4 days to go till Halo 3 launches, I have to ask, what's the point in releasing these things now as opposed to later? Still I guess it's worth a download.
Oh and if you're lucky enough to have acquired a copy of Halo 3 early, here's some good news for you:
"Hopefully I can put these Halo 3 ban rumors to rest...
If you obtain a copy of Halo 3 prior to its street date of Sept 25th, you will NOT be banned from Xbox Live for playing Halo 3 early (not even my fellow softies)."
by the Microsoft PR Gaming Blog site.