Supposedly ATI will be releasing specs to make it easier to write open source drivers. I'll believe it when I see it. This is one of main reasons that I don't buy laptops with AMD chips. The video card is typically an ATI and the wireless card is something that does not have open specs.
Perhaps AMD and their vendors can purchase some intel wireless cards to bundle with their laptops. By buying an Intel Centrino laptop, I know that usually there's an Intel wireless card in the laptop.
If you didn't see it, AMD/ATI has released specs for the 2D portion of one of their graphics chipsets. We'll wait to see what happens with the 3D specs. The link will take you to X Org's website.