I've been working on a Keyholder+Backup System project. When I hang up my keys at night, I plug in my USB drive into the Omega2+. It mounts an encrypted container, then overnight, my backup system backs up files to that USB drive over the wifi connection. Then in the morning when I grab my keys, I take my latest backups with me.
Its been a fun project, and I'm loving having a backup of my important files on my keychain with me all the time!
Files and project stuff are here on github: https://github.com/thinklearndo/keychainbackup