Check these out.
They are called "Archival Quality" and the burn-in part of the disc is made of 99.99% 24-karat gold.
CDs have been tested in accelerated tests and are estimated that data integrity will last for 300 years.
Kodak Preservation media DVDs have been estimated to last 80 to 100 years.
I just found this out...thought I would pass it along to all you peeps:
http://www.kmpmedia.com/kodak-gold.html