If you weren't aware, VIA Technologies had previously opened up their Unichrome display drivers and had begun releasing the source code, though the quality of the drivers could be debated. However, it seems that the times have changed and VIA has reverted to providing new binary-only drivers. This was pointed out by Luc Verhaegen
who is one of the SourceForge Unichrome Project
developers. A thread is currently going in the Phoronix Forums
to discuss this closed-source happening. Meanwhile we haven't heard anything from XGI Tech in quite a few months about their GNU GPL driver potential. Their last XGI Volari Linux display driver release happened back on January 2, 2006 when they had introduced Linux 2.6 kernel support.