And suddenly, there's the Raspberry Pi 2. It has twice the memory (1gb, the Pi 1 is 512 mb) a clock speed of 900mhx (the Pi 1 is 700 if you dn't overclock it) and it's quad core, meaning that it has four CPUs, and linux will nicely take advantage of those. It has four USB ports (the old Pi had two).The old Pi 1 was $35; the new Pi 2 is $35, so that's a 0% increase.
I want one.
RS components are, of course, out of stock. Oh well, I don't want one urgently. The Pi 1's that I'm using (a dozen or so) are working very well, and most importantly, they are very stable. They've been running for more than a year, and they just don't crash at all!