I snatched up a RaspPi version B last week when Adafruit had them in stock for a few minutes. It got here today and I barely had time to find a power supply adapter for it before bed. I started reading up though, and only then did I learn that there is only one
PWM capable GPIO. There are workarounds of course-like an ATTiny or the PCA9685 on I2C, but that's hardly satisfying when you were raised on a steady diet of Arduino. Also, you can't use the PWM pin and the built in audio at the same time. Still, for $35 US, it's a single board Linux machine.