It depends on whether you're going to put a NAS at my place. If you are then password protect the shares on it and don't tell me the password. Then I can just do the same at yours when I get round to it. Otherwise maybe we could look at using duplicity on our existing NAS'? It's available on Macports so you could run it on your Pro and also a few people have made it run directly on the ReadyNAS NV+.