relased the Catalyst 7.12 as a late Xmas present and these are the last drivers we can expect to see; but you never quite know with ATI, as last year we got a 6.13.
Improvements in the 7.12's include better overclocking support for HD 2900 in CrossFire, better performance in 3DMark05 for the 2400 and 2600-series, and Company of Heroes for the 38x0-series.
There's also a whole bunch of other fixes for both Windows Vista and XP.
You can grab the drivers here
Expreview has run a quick set of benchmarks using a 2600XT and it looks like the drivers also have a major inpact on performance for World in Conflict. You can check out the graphs here