I was just pointing out that it's considered stable.
If ATI/fglx has Ubuntu support(ed) and X Server 1.7.5 is stable, then isn't there a decent chance that the driver and related files needed should work? In other words, problems may be attributed to support side and not so much X.Org or X-Server? Just speculating.
You have to use 9.10 to avoid any driver issues then but if you try Lucid, it won't work? When Lucid is released at the end of April, does that mean the ATI fglrx driver will be ready then?