News.com has a funny story about Apple selling silent songs (for 99 cents, as other songs)!

They have many versions of silence, by various authors. The most funny is the last part of the article:

John Cage created a 4'33" silent song in 1952 (it was even played by the BBC Symphony orchestra this year!), and won a copyright in 2002, as Mike Batt created also a silent song.

Batt's defence ("Mine is a much better silent piece. I have been able to say in one minute what Cage could only say in four minutes and 33 seconds.") did not work apparently!