This is old news, from about five years ago, but what the heck... I haven't seen it summarized anywhere else.
Pat Metheny wrote about his opinion of soprano sax player Kenny G, including it in the Question and Answer section of the Pat Metheny Group web site. Kenny G had recently released a recording of his playing spliced onto Louis Armstrong's classic "What a Wonderful World". Metheny considered this to be a tasteless act, and explained why in a forceful and eloquent way.
Word of Metheny's criticism got out, the text was forwarded and passed around, and it become headline material. I remember reading an article about it in a copy of Entertainment Weekly on a plane trip. It makes the news when someone with a reputation for being humble, mellow, and generous lashes out. It's a beautifully written and entertaining flame, but at the same time his message is truly important.
The entry was soon removed from the Pat Metheny web site. Of course by then it copies has been stashed away and it is now available at a number of places, such as Jazz Guitar Online: Pat Metheny on Kenny G (including a follow-up posting), and Jazz Oasis: Pat Metheny on Kenny G.
[Later: Sigh, the jazzguitar.com site is no longer around. You can view an archived version of it here: Archived Jazz Guitar Online: Pat Metheny on Kenny G.]
It's definitely worth the read. (Go...) (...if only to see the use of the term musical necrophilia.)
But the kicker is that Richard Thompson (probably best known as the guitarist with Fairport Convention) joined in by writing a song called "I Agree with Pat Metheny, Kenny's Talents are Too Teeny", which he plays at his concerts.
And here are the lyrics to read along with. Note the cool references to the deatails of the Metheny commentary. And the way the rhymes are so thoroughly tortured.