"I know nothing about Linux and I'd like to keep it that way" I'd wait for an app then that can do it for you.
Most details can be found at WebOsInternals to install the SSH server and a DyDNS client on the Pre. Once you get that far, setting up the SSH Picture Sync / Backup / Dropbox should be trivial if you know what you are doing. Unless you have experience with Linux, Putty, SSH, etc; I wouldn't try this at home. Sam [Non-text portions of this message have been removed]
