It looks like ATI will be offering the Catalyst 9.3 drivers later today.
The new drivers will the "industry's first unified driver installation package to incorporate Windows 7 support." The new Windows 7 driver will support the Radeon HD 3000 and 4000 series cards and add new features from Windows 7 like Aero Peek and Aero Shake.
"Thanks to the incredible expertise within our driver development team, we led the Windows Vista transition with a WHQL-certified unified driver that delivered industry-leading stability," said Ben Bar-Haim, corporate vice president, Software Engineering, Graphics Products Group, AMD. "The advanced state of our Windows 7 drivers this far ahead of the final Windows 7 release is yet another proof point of our graphics industry leadership. We are ready for Windows 7."