Emagic (the company that created SoundDiver) was bought by Apple Computer several years ago.
If you’re running Windows 98 or Mac OS9, CD-ROMs of SoundDiver are available from Roland US Customer Service at (323) 890-3700 x5305.
There is no Windows XP version of SoundDiver available, but one can purchase an editor from SQuest.
If you’re on Mac OSX, there’s a free public beta of SoundDiver available
It is unknown whether or not Apple will release a proper version.