Apple has updated its iPod and iPod mini software respectively to version 1.2 and 3.02. This update is only for click wheel iPod and iPod mini.

Changes on iPod mini Software 1.2:
Compatibility with iTunes 4.7 and iTunes Music Store
Shuffle and play song library with one click (using the Shuffle Songs item in the main menu)
Create multiple On-The-Go playlists
Delete songs from On-The-Go playlists
Select reading playback speed for audiobooks
Hear Click Wheel clicker through headphones
Sync and go with improved disconnect performance

Changes on iPod Software 3.0.2 provides:
Compatibility with iTunes 4.7 and iTunes Music Store
Improved USB 2.0 connectivity

The 20Mb(!) update is available through Software Update utility.