The Tech Report has links to get the last Catalyst driver for 2006.  Don’t expect any mind blowing speed increases, but the bug fixes are nice and so is Crossfire DirectX with multi-GPUs which fixes a big problem some users had.
“CrossFire and video acceleration aside, ATI mentions no performance improvements in this particular driver update. However, a number of bugs were fixed in Black & White 2, Neverwinter Nights, the Catalyst Control Center, and other miscellaneous applications. Detailed release notes for the new drivers are available here”

Here are some more Graphics Card articles from around the web:

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