My photos are very important to me, so i do several backups: 1) The iPhoto Library is rsync'd to an external HDD 2) The iPhoto Library is rsync'd to a local FreeNAS box 3) Arq backup to S3 http://www.haystacksoftware.com/arq/ 4) Crashplan backup to 3 locations: an external drive, a local server (not the FreeNAS box), as well as Crashplan central.

Terabytes are cheap, memories are not.