Fresh from its continental crossing from Sparkfun in Colorado, my Teensy 3.0 was delivered today by Canada Post.
Designed by Paul J. Stoffregen, the Teensy 3.0 is an ARM Cortex M4-based (Freescale MK20DX128) micro-controller board designed with some serious horsepower under the hood. Wooed by the Arduino library compatibility (Teensyduino & Paul commits updates to the Arduino project regularly), the active support forms, and superior firepower (3 UARTs!), I was unprepared for the changes needed when using libraries written for 8-bit AVR libraries with 32-bit ARM addressing. While there is definitely a bigger learning curve compared to a standard Arduino board, the lower cost of entry and the flexibility of breadboard circuit experimenting has made for a positive experience overall.