Woo R128 support! I know of quite a few, still useful laptops with R128 cards in them. Both PPC and x86. The r128 was an extremely popular chip and I'm glad this dev continues work on the X driver. I as others in this thread have a stack of them, two of which are PPC mac compatible. And IIRC AMD has some fairly recent server chipsets with mach64 and r128 based gpu's.
As for the people saying this is a waste of time, I don't see you paying him, so if he wants to work on r128 let him. Now all we need is someone to spend some time one the sis and via chipsets and X11 will once again be king of legacy hardware support with modern software.