[arch-general] some notes on the radeon gallium driver

Hi, just if anyone is interested... I compiled mesa 7.9 and tried the radeon gallium driver on a X300 ati card. It works pretty good. For instance, now I can use the blur effect of kwin 4.5, while I couldn't with classic mesa 7.9 driver. I don't play games, so I cannot tell what is different with games... Maybe we might have an ati-dri package in [testing] that ships r300g instead of r300c... Stefano