iFolder is a superb solution to keep your files synchronized (using delta-sync) on multiple computers/laptops as single user or in groups and in a secure manner. Content can be accessed from any system offering an internet connection using a standard browser or iFolder client (clients are available on Linux, Mac & Windows).

More info on the open source iFolder project : http://www.kablink.org/

On a running openSUSE 11.x system, you can have your iFolder Server up and running within 15 minutes.