“Several companies are offering their own versions of stackable Mac mini look-alikes that offer USB and FireWire hubs along with large hard drives, allowing you to increase your storage and connect more devices...

NewerTech offers two hard drive/hub solutions: the original miniStack and the miniStack V2. The original miniStack USB has three USB ports and and a special micro security slot designed to allow the Newer Technology miniStack to be anchored to a desk. They are available in 80GB to 500GB versions that sell for $99.95 to $279.99.

The miniStack V2 from NewerTechnology three USB and three FireWire ports, with one of each on the side of the drive and the others on the back. This drive has the largest storage capacity of any on the market, with a 750GB version. The miniStack V2 is available as an "add your own hard drive kit" for $74.95 or it can be purchased in 80GB, 160GB, 250GB, 320GB, 400GB, 500GB or 750GB models ranging from $119.99 to $495.”