Dyson makes interesting products. I haven't used their vacuums, but from both testimony of people who have, and the number of people copying them, they appear to be excellent.
I have used the Dyson Air Blade hand dryer, and it is by far the best hand dryer I've ever used. In a couple seconds, it gets your hands as dry as a towel
A few days ago, I saw the Dyson Air Multiplier at Meijers--Dyson's take on a fan. Looks really neat, seems to work quietly and well...
...but it is $300. For a portable fan.