The SONY camera I know of is based upon the MiniDisk.

I under stand these are the features
    :has all the normal audio MD functions
    :stores up to 2000 photos on one MiniDisk
    :can record audio at the same time as photos are taken
    :has a fast computer interface which allows the MD to be
       accessed the same as a floppy drive (read & write).
    :photos are accessable as ".jpg" files

I have not found the URL that contained this product.
It is about 3 months old.