inotify to know when to run rsync (probably best bet for me)
http://techarena51.com/index.php/inotify-tools-example/
http://pythonic.zoomquiet.io/data/20081023114228/index.html
Has bash script example:
http://stackoverflow.com/questions/7566569/how-to-continuosly-monitor-the-directory-using-dnotify-inotify-command
At bottom is a downloadable file that contains example (uses ‘make’)
http://www.ibm.com/developerworks/library/l-inotify/