Looks like it's been debunked already.
http://www.engadgethd.com/2008/07/07/pioneers-blu-ray-disc-hits-400gb/
Update: Now that the English press release is out, it's less clear whether the new media -- whenever it might come to market -- will work in existing players or not. While "it is possible to maintain compatibility between the new 16-layer optical disc and the BD discs," players would seemingly require a modified optical pick-up mechanism to see the data. We'll learn more on July 13th when Pioneer discusses the breakthrough in detail.
Yet, today, America's leaders are reenacting every folly that brought these great powers [Russia, Germany, and Japan] to ruin -- from arrogance and hubris, to assertions of global hegemony, to imperial overstretch, to trumpeting new 'crusades,' to handing out war guarantees to regions and countries where Americans have never fought before. We are piling up the kind of commitments that produced the greatest disasters of the twentieth century.
— Pat Buchanan – A Republic, Not an Empire
