some 2004 and 2005 pages:
http://www.manifest-tech.com/media_dvd/dvd_holo.htm
http://en.wikipedia.org/wiki/Holographic_Versatile_Disc
These dvd discs could hold up to 3.9 TB !
"the Holographic Versatile Disc (HVD) is an optical disc technology that, in the future, may hold up to 3.9 terabytes (TB) of information, although the current maximum is 500GB"