Recently there was a server outage at Microsoft subsidiary Danger which has ended in a lot of user’s losing their personal data. This is what happens when you don’t do your own backups and leave all of your data in the cloud (internet). There is a discussion about this on Slashdot but what it really comes down to is responsibility. Your data is your responsibility. If you give it to someone else then it is your fault when they fail to keep it safe or even to keep it at all.