Wotcha. Up until now I've only found one that fits the requirements, but it's been discontinued (http://www.addonics.com/products/enclosures/ae25rdesu.asp) , I have since found two different offerings: http://atlastsolutions.com/shop/product_info.php?products_id=657 http://www.expansys.com/newertech-g...iate&utm_medium=shopping&utm_campaign=ciao-uk Unfortunately, the Newertech one doesn't allow you to supply your own disks, but 161 quid for twin 2.5" 7200 RPM disks doesn't seem too bad anyway. Added to the fact it can power itself from Firewire (but supply included in case not) looks a pretty decent solution. It's bang up to date as well, while the atlast solutions one is quite old. The thing with the top one is that it's 42 quid, and I'd only have to put another 39 quid to match a current drive WD3200BEKT that I have. This will comes in at slightly less than 100 pounds (inc postage) for 320Gb RAID 1 solution. The Newertech one is 500Gb, for 60 pounds more. This will prolly be a negative, but has anyone used either of these solutions? Any other portable systems anyone uses?