Google launched a music service that inludes lyrics snippets and links.

Joe Gratz says "The snippets are short and help to identify the song, so they're probably privileged as fair use. In my opinion and that of many others, a link alone is almost never an infringement, and Google would fall under the information location tool safe harbor in any case."

He foresees upcoming copyright issues similar to P2P and music. Are links to unauthorized content legal? What constitutes fair use?