Paul, The ATI Radeon HD 4870 works with the Xorg ATI Radeon driver that comes with OS2008.11-b98.
Use this Live CD: http://www.genunix.org/distributions/indiana/osol-0811-98-global.iso Ensure you are using the radeon driver in your Xorg.0.log file. -- This message posted from opensolaris.org
