Wiki (http://www.plan9.bell-labs.com/wiki/plan9/radeon_drivers) says "the Radeon drivers are now (1/2010) part of the distribution". I have a device which seems to work with the drivers: ATI Mobility Radeon 9600 M10 (RV350). I obtained vid and did numbers with the help of pci(8) and added them to the /lib/vgadb. Now, vga(8) cannot initialize the device,saying:
aux/vga: radeon: not found. What do you think? By the way, vid and did attributes in the /lib/vgadb are not documented in vgadb(6). Can be confusing.