Attention all Radeon users: AMD's latest Catalyst graphics drivers are now available. The September 2008 (or 8.9) release doesn't break a whole lot of new ground, but it introduces a couple of changes, early OpenGL 3.0 support, and the usual round of bug fixes.
With the Catalyst 8.9 drivers for Windows, users of four-way CrossFire X configs can now overclock their GPUs through Overdrive software. AMD has also added support for custom 50Hz 1080p display modes in Radeons from the X1000 series upward, which should let folks "configure their own custom 1080p @ 50Hz modes to best fit their display." OpenGL 3.0 support is limited to 10 extensions right now, but AMD vows it will "continue to expand support."
On top of that, this driver release fixes bugs in Age of Conan, Assassin's Creed, Clive Barker's Jericho, Company of Heroes, DiRT, and Race Driver GRID. You'll find the Catalyst 8.9 drivers for Windows XP and Windows Vista in 32-bit and 64-bit flavors from this page. Release notes in PDF format are up here.
For Linux users, the penguin-themed Catalyst 8.9 drivers bring compatibility with OpenSuSE 11 and Red Flag DT6SP1 distributions, and they fix bugs related to the 2.6.26 kernel, WINE, the Catalyst Control Center Linux Edition, HDMI audio output, and driver installation on Radeon HD 4870 cards. You'll find the full Linux release notes here and driver download links on AMD's 32-bit and 64-bit pages.