AMD's Catalyst team is on a roll, with its third graphics driver release out in just under two weeks. The Catalyst 11.11b "performance driver" actually went up late Friday, just four days after the previous release; you can grab it now from AMD's website.
What's new this time? The change log looks pretty much the same as for last Monday's 11.11a driver, except AMD now touts "CrossFire performance scaling" for both Assassin's Creed Revelations and The Elder Scrolls V: Skyrim. (The 11.11a release added CrossFire support for Rage, too.) CrossFire support for Skyrim is apparently restricted to the Radeon HD 6000 series for now, but no such limitation is mentioned for the other games.
And... that's about it. The new drivers are offered, as usual, for Windows 7, Vista, and XP in 32-bit and 64-bit variants. This release hasn't received the nod of approval from Microsoft's Windows Hardware Quality Labs, though, so users more interested in stability than bleeding-edge tweaks may want to stick to the Catalyst 11.11 WHQL drivers.