yes, certainly great news. I was whining for this from days of my R200 agp card to Radeon 9600se card but when beryl started to get ugly and Ati stopped supporting old cards (old meaning released 6 months ago etc) I had to ditch and jump the ship.
I am sure ATI started to feel the heat with marketing team showing powerpoint presentations showing Sales sloping down etc. Thats exactly how businesses will listen to customers.
Same with nvidia, they won't release any opensource stuff unless they have too.
Anyway, I think its finally good for community, One mountain is crossed , many more like this are waiting.
Cheers to Opensource