@MPVarner:
Yes it is true, in fact i am a betatester running it under my AmigaOne XE G4,something that i`m very proud of, if you ask me.There will be a developer`s prerelease soon enough, with developer tools and info,and if i recall correctly there is still going the "earlybird" offer that includes a free copy of OS4 with every A1 motherboard sold,but that is going to end soon, so be fast and you will get it included.
EDIT: there is already going aroung Europe and US, several shows have been made, showing it working, and there are available some videos, too.just search around a little.