I thought it would be useful here to give a visual comparison between the two big players in the USB162 market, AVROpendous and the Teensy. Here are the three boards next to one another:
From left: the Original AVROpendous board, the new AVROpendous Mini [ed: AVRopendous-Tiny], and the Teensy. All nice boards - I use the AVROpendous quite a lot, and last week I spent the day teaching my friend C and AVRs using the easy-to-use Teensy board. He’s now a happy camper (and hopefully converted from the TI MSP430 we used at University) and I’m happy that the Teensy has given him an easy way to experiment.