check out the link below.

if i am not mistaken it says that Matsushita says that near the end of 2009 we will see optical media with 100gb and above?

http://headlines.yahoo.co.jp/hl?a=20070903-00000013-imp-sci

aren't the hvd prototypes up to 300 gigs already with 1tb a possiblity ?

anyway i'm not sure if this is speaking of the quad layer bluray discs but its my understanding that even the dual layer 50 gig discs ar elow in yield and most are infact 45 gig discs . I really don't know how expensive tehse quad layer discs would be or if they are infact readable with todays bluray drives. I'd be interested to learn more about it though

i dont know for sure if they talk about Bluray disc 100gb and above that is why i said optical discs.

and as you said i like to learn more about it too. unfortunate i do not have a contact in matsushita. maybe somebody else here can help

anyway i'm not sure if this is speaking of the quad layer bluray discs but its my understanding that even the dual layer 50 gig discs ar elow in yield and most are infact 45 gig discs . I really don't know how expensive tehse quad layer discs would be or if they are infact readable with todays bluray drives. I'd be interested to learn more about it thoughWhere did that "45 gig" come from, are you sure you are talking about a physical format?

Although the Blu-ray Disc specification has been finalized, engineers continue working to advance the technology. Quad-layer (100 GB) discs have been demonstrated on a drive with modified optics. Furthermore TDK announced in August 2006 that they have created a working experimental Blu-ray Disc capable of holding 200 GB of data on a single side, using six 33 GB data layers.[4] Such discs would probably not work on today's players, as these devices are only designed and tested on discs that meet the current specification.

Also behind closed doors at CES 2007, Ritek has revealed that they had successfully developed a High Definition optical disc process that extends the disc capacity of both competing formats to 10 layers. That increases the capacity of the discs to 250 GB for Blu-ray compared to 150 GB for HD DVD using the same process. However, they noted that the major obstacle is that current reader and writer technology does not support the additional layers.[5]