how about the archive CDs ... supposedly they last for a couple hundred years. More expensive though, but if they work, probably well worth it
http://www.mam-a.com/products/gold/archive.html

archival DVD too

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854