It's a nice variation on the Mac Mini theme. Looks like its main advantage is the stock hard drive size, it's very similar otherwise save for the ease of access. Having been inside the Mini to install a larger drive for a friend it's not that hard to get open, but it's not that easy either. I'm a touch surprised on the price as its pretty comparable price wise to the Mini. It's a shame it doesn't have built in Bluetooth, otherwise you have to use a USB port for a BT dongle, not to mention WiFi appears (From Dells website) optional and not standard. Tiny machines like this really should have as few wires as possible since they are 'appearance machines'.

These would be great for small devices like small internal amplifiers and power supplies. When I built a boom-box in wood class (Yes, a WOOD boom-box, 42 watts worth with a folded internal enclosure for good bass) in the early 80's I found cooling inside the case to be troublesome. Eventually I used some scrap aluminum and fed it through the back to aid in cooling. Worked pretty well though with the 8 'D' cells it weighted a hefty amount. The biggest issue I see is the ozone creation, its corrosive and also problematic for those with Asthma. As others alluded to, it would be a HUGE boon to laptop cooling. Instead of 1 or 2 fans you could have 4 or 5 of these things pumping air around. Calling it a 'free air pump' would get around those that object to calling these a fan. The one issue these won't solve by themselves is dust, based what I can divine of their design these would suffer from the same dust issues a 'real' fan would suffer from.