Hasn't been the most highly publicised netbook but from what I can see, the Latitude 2100 has actually been available since around May and plenty of comments suggest it has a fan.
So is this an updated version or something?
Don't know, I took the Register Hardware reviewer's word for it when he said it was fanless...
The square casing does have benefits, however. It has allowed Dell to fit ventilation grilles at the front and on the left side with the result that the fanless 2100 runs rather more coolly than its Inspiron Mini cousins. Secondly, by moving the vents from the underside of the chassis, the machine is supposedly more resilient to nearby liquid spills.
Plus it does make sense that a machine aimed at the education sector would have as few moving parts as possible.