I'm very lazy when I have to pay for a service that can be free. Synchronization for me is very important, I'm always on the run and unfortunately often I cannot use my Mac and I have to use another laptop. For that reason I'm using the Google Browser Sync plug-in for Firefox for example, even if a bit scared about my privacy... Backup is also important, a service like .Mac is very nice, but it costs. Searching for something complitely not related(*) I've found this page today: Do It Yourself .Mac - The Network People, Inc. The wiki explains how to setup a linux server to act like the .Mac server... Looks very cool... (*) If you write "Collection result = (Collection ) query.execute();" you will have a warning message like "Type safety: The cast from Object to Collection is actually checking against the erased type Collection": what the hell does it means??? I think that I'll ask a solution for this on the JugTorino ML about this... Ok, thanks to Carlo for the fast reply, no other choice than to add a "@SuppressWarnings("unchecked")" that's why I'm using an unchecked library... Kodo