The driver was putback'ed into solaris months ago. It just supports ATI Radeon X800 or below. No more updates. If you want to try it, just run
update_drv -a -i the-alias-of-your-video-card
I saw some guys in community are still trying to install the old tarball on build 100 or above and cause system not to boot. So I am removing old notes here.
Only if your system is old engouth, which means there is no this binary /kernel/drv/radeon, then you can try installing this tarball.
on 2009/10/26 12:41