It's obvious that many 1st gen mac pro owners are longing for a video card upgrade. Seeing as how nVidia never released any retail video cards for any Macs, I see little to no hope in that regard. However, in the past ATI sold some very good Mac video cards. But, they haven't released any new ones in quite some time. Can we expect them to release any of their newer cards for use in Mac Pros or are users forced to upgrade to a new machine to get a more powerful video card?