This is what we have learned so far about 120min CDs:
a) The media manufactured from the same company that makes 99min CDs
b) There are CDR-W drives, which can burn them! Mitsumi 4804TE works fine
c) The technology behinds them is the same as used with 99min CDs
d) 120min media is very hard to find.. We will try getting some pieces soon and test them..

Where the media could be used?
a) Yes i know what you are thinking. DC backups
b) What about SVCDs ??
c) Regular use