iTunes 7.1 (Apple TV Support) and Quicktime 7.1.5
Apple released software updates for iTunes and Quicktime today.
Using iTunes 7.1, you can now enjoy your favorite iTunes movies, TV shows, music, and more from the comfort of your living room with Apple TV. iTunes 7.1 also supports a new full screen Cover Flow and improved sorting options to let you decide how iTunes should sort your favorite artists, albums, and songs. (Mac, Windows)
The Apple TV was delayed to a "mid March" ship date with the earliest web orders showing a March 20th shipping date.