Since buying my iMac I've realised I don't have anywhere near the amount of storage space I need. I've decided I need something with RAID 1 and for the moment 500gb will probably be a nice ball park figure, however I may want more later. I've looked at a few NAS drives ( in the £200 range ) and they look fine but upgrading them seems like their downfall. I also want something that is near enough silent. I've been thinking about getting a mini-itx board and processor (fanless), sticking it in a full size case and sticking something like Linux or FreeNAS on it, perhaps booting from a CF card or USB stick. Anyone ever done this? Any thoughs? Pitfalls?