Code Review of Doom For the iPhone
Nah, too easy and direct approach.
Secure File Storage Over Non-Trusted FTP?
I use Amazons S3 service and a great multi-platform UI called JungleDisk. S3 costs a little bit, but you get security (encryption), backup, reliability for a cheap price.
Check out: http://www.amazon.com/s3 and http://www.jungledisk.com/