Apple has been working very hard today, iTunes 6.0.2 has been rolled out in Software Update, described with the following:
With iTunes 6, you can preview, buy, and download over 2,000 music videos and hit TV shows on the iTunes Music Store and sync your music and purchased videos with iPod to enjoy on the go. To watch purchased videos, you must have QuickTime 7.0.3 or later and Mac OS X 10.3.9 or later.
iTunes 6.0.2 includes stability and performance improvements over iTunes 6.0.1.
Note: After purchasing music from the iTunes Music Store with iTunes 6 or later, you will also need to upgrade your other computers that purchase music from the iTunes Music Store to the latest version of iTunes.