AIM 7.1 was released today, the successor to AIM 7.0. You can update the client at aim.com.

This update includes mainly bug fixes and tweaks from 7.0 and some feature enhancements. Particularly, it runs faster and uses less system resources. Also, it includes major support for Windows 7. It has buddy icons that change on the taskbar according to your away, idle, or available state plus more. The Lifestream also got a few tweaks.