Can I use my Ubuntu One account to backup with Déjà Dup?
Solution 1:
Yes, Déjà Dup now (as of Ubuntu 11.10) supports backing up files directly into Ubuntu One.
Select 'Ubuntu One' under 'Storage', like below:
Solution 2:
You should be able to sync your back ups with Ubuntu One by setting your backup location to your Ubuntu One folder in your Home folder.