Haiku-OS is the new name of the project formerly known as OpenBeOS. Haiku-OS will also be used as the reference platform for any other OSBOS (Open Source BeOS) project, although it will not represent a standard in itself.
I thought that was quite clear.
I still think Haiku is a particularly silly name to adopt, whatever the inside joke about it might have been.
The again, it's the season for silly decisions. OpenBeOS is Haiku-OS, SkyOS going commercial...