Here’s the best sources of info I could find on setting up RSYNC on Linux and OS X.

• Best info here, including useful basic commands – http://transamrit.net/docs/rsync/
• Also good, with better example of command to use – http://everythinglinux.org/rsync/
• Installing an rsync server on MAC OS X. Note you need to use rsync.plist instead of inet or xinetd.d.
• ssh usage
• use –password-file option to automate password

And two handy tips -

• Strict mode = false, essential!!!
• Chmod directory of the “archive” on rsync server side, to be 777. Maybe use the sticky bit?