Depends on your distribution.
As the picture below shows, the RadeonHD 2600 Mobility driver working relatively fine in Mepis Linux 7 RC1 using the Fglrx installer. Relatively fine is qualified as it was using the Mesa 3D driver.
Updating through the Mepis Linux X.org X-Assistant when the 8.43 driver was released shows another relatively working driver installation. Relative defined by an existing thread here.