A new beta driver has been released with eyefinity 2.1. It can been downloaded from Guru3D:
link. Sadly this driver doesn't support the 7xxx series.
EDIT: Official
link to AMD page.
Release notes:
Feature highlights of the AMD Catalyst™ 12.2 driver:
AMD Eyefinity 2.1 technology enhancements
Additional resolution support: Users can now choose from a larger set of resolutions when running AMD Eyefinity
Dynamic Configuration Changes: Switching between different display configurations will occur automatically when physically plugging/un-plugging displays
HydraVision™ enhancements: The Windows Task bar can now be moved and resized based on users preference
Profile Manager improvements: Increased support for Display Groups (including 5x1) and Extended configurations within the Profile Manager
The 12.2 preview is the same as 12.1 whql accept for the 2.1 eyefinity changes and some bugfixes (known problems with win7).