That's right Mike, FB won't include anything officially, and no upgrade script between beta to RCs, or RCs to the final. I don't think Nukecops has them neither. You have to be carefully to start using them if you one of those that always modify the codes instead on just the theme's layout.

The old phpbb2 that include with nuke 6.5, it's not the newest version but it has all the necessary fix to be secure, so don't worry about that. I think FB won't include an upgrade for 6.0 users to upgrade their forum port but Nukecops does, and again... unofficial one