The key point behind it is the price is well on the right side of the price threshold between 'I'd like one but it's a bit too much' (about 40-50 GBP in my case) and 'That's cheap and looks good, I'll have one' (about 25GBP in my case). That's an important factor and why demand is so high (a little too high at the moment). Also yep there's more cost for extras but they, as many pointed out, are requisite for any board you buy, so a more expensive board shoves the total price point up by the comparative amount. In this case cheap means 'less than most other equivalents' not 'it's only 35 bucks!!'. The third factor is that by the time I had mine all the files, tutorials, etc. I meeded to get it going inside 2 hours were on hand. Last time I bought a minature ARM dev board I paid a lit more and it went back in the box after a couple of days because I couldn't find the stuff I needed to get it going (it was a few years ago) Raspberry Pi has been the dismetric opposite. Satisfyingly inexpensive, easy to setup and use. Now mine is running 24/7 pretending to be a VAX. The whole lot including extras cost me less than 50 GBP. Mark me satisfied. -- Mark Benson http://markbenson.org/blog http://twitter.com/MDBenson