TUAW reports that iTunes 10.1.1 is available via Software Update.

This looks like a minor bug fix update with no new features. Here are the fixes:

Addresses an issue where some music videos might not play on Macs with NVIDIA GeForce 9400 or 9600 graphics
Fixes an issue where iTunes may unexpectedly quit when deleting a playlist that has the iTunes Sidebar showing
Fixes an issue where iTunes may unexpectedly quit when connecting an iPod to a PowerPC equipped Mac
Addresses an issue where some music videos might not sync to an iPod, iPhone, or iPad

  iTunes 10.1.1 is available in Software Update