Phoronix: FreeBSD Radeon Support Might Be Good In Mesa 9.2
The porting of the open-source Radeon Linux graphics driver to FreeBSD is coming along well. The developer behind this work is hoping that the user-space Radeon Mesa/Gallium3D driver changes will be merged upstream for Mesa 9.2...
and what about pc-bsd, ghostbsd, etc? Until I know, there is not exactly the same bsd kernel in each one, so, Do they will be benefited about this?
PC-BSD uses the same kernel as FreeBSD - it's just FreeBSD with some spiffy graphics and a new packaging system. PC-BSD devs are FreeBSD devs, and it was the company behind PC-BSD that part-sponsored Konstantin Belousov's work to implement Intel Kernel Modesetting.