Bashiok answered a few questions about Direct X 10 today. First up, will D3 support it?
Follow up questions got increasingly technical. Don’t take any of this as set in stone until Blizzard makes a more official announcement, much closer to the release date.
…I could just be wrong about SLi/Crossfire support. It just logically doesn’t seem to me like the software can make the call on where the frames are sent to draw. Whether there’s a performance increase or not is another thing of course. I don’t know enough about it though, I should ask a programmer.