I have received e-mails from people asking about the Amazon.com message regarding Chéreau's Tristan on DVD. On Amazon.com it says: "This item has been discontinued by the manufacturer."
A spokesman for EMI and Virgin Classics say that the US release date probably is different, and that this explains the message on Amazon.com.
If you can't wait, you get the 3 DVDs practically for free at Amazon.co.uk. Play.com doesn't seem to be interested in selling it. Amazon.de does not have it yet.