Make your ATOM fanless before you shot for personal cloud, the reason I avoid ATOM-NAS is not just the cost, but the noisy fan.
On the other hand, Marvell and Freescale's NAS chip can both be fanless and are as powerful, if not more.
@resistion- no, I don't think you are supposed to lug an NAS around with you. The idea is you have it plugged in and connected at your office, and you can access the data from your desk or remotely from a smartphone, tablet, notebook or other device. It's your own "cloud."
My home NAS system uses an Atom, and while I would prefer a fanless system, the fan noise is really only noticeable at bootup. Once the system is up and running, the fan slows down and it is very quiet.
I have been shopping for a home NAS system. Decent hardware is coming down in price, but NAS software seems to be lagging. Microsoft has taken a step backwards in their latest offering. NAS vendors that develop their own software seem to have holes as well. Are you happy with your system Frank?
I'm happy with the system -- a Netgear ReadyNAS Ultra with 4 bays -- and I populated each bay with 2TB. I am disappointed though that it didn't come with any 3rd party backup software, and the backup client in Windows 7 Home Premium, to my amazement, does not support backups to a network drive. Really, in this day and age Microsoft?
Rather than invest in Windows 7 Professional or Enterprise or whatever, I just shopped around for a 3rd party backup program that met my needs.