The Rosetta Project is an initiative of the Long Now Foundation which is building an online archive of human languages, as well as designing a physical back-up through its aesthetically very pleasing Rosetta Disks.

The project, in my assessment, is multifunctional in that it deals with a current problem but also with possible future issues, and it has a level of redundancy, in terms of the format.

The Svarbard Global Seed Vault will be a crop biodiversity vault built deep within a mountain on Spitsbergen. The project, paid for by the Norwegian goverment, will provide a backup in case local disasters strike a regional genebank (as the BBC reports, this occured in the Philippines) as well as being a backup in the case of a more global disaster.

There's also talk of a Moon Ark, but I think that is rather silly.

(Seed Vault and Moon Ark thru WorldChanging)