I havnt read "this" but i guess your refering to the OpenBeOS FAQ?
In that case, yer your right. This could be a terrific OS when its finished. Parts that are finished and have the exact same functinoality of the old BeOS say they're running even faster then Be Incs peices.
I dont think it would be too hard to get this project ported to the A1. Not hard at all. It would be far more worth while porting it to that, then the A3000!!!