Pioneer Has 400GB Blu-ray Disc
 

Currently, the 400GB disc is slated to hit mass production sometime between now and 2010, while rewritable versions won't hit until 2010 to 2012. Not like it really matters though -- a 1TB disc is on track for 2013, and you know you'll be waiting for the latest and greatest.

http://www.engadget.com/2008/12/02/p...rms-compatibi/