I have a Raspberry Pi setup as a NAS and media server (see http://www.naspberrypi.com/) and the first thing I did was download the Linux x64 version for my laptop and the ARM version for my NAS and I had them syncing in about 5 minutes. This is awesome. I'm going to ship another NASpberry Pi (along with an external hard drive that's already a clone of my existing backup drive) to my brother who lives on the other side of the country and completely replace my $100/year backup service with this.