The Teensy board (tiny Atmel AT90USB162 USB proto board) from PJRC arrived today, and it is indeed very small. I gave the pre-packaged examples a try, using the command-line teensy_loader_cli application. Much to the credit of PJRC, the Teensy loader worked swimmingly on the first try. The blinky morse code example also built and installed cleanly, along with the HID Listen application which allows one to view debug info (printf-style) that can be sent over the USB link. Quite a nice set of tools for starting out with development. Based on a very positive out-of-box experience and open-source support, Teensy promises to be a very approachable development tool for USB applications. Here are some pictures of the board, one with a US dime for reference and the other in a custom enclosure made out of some rapid-prototyping thermoplastic material scavenged from my home (where it is readily available in large quantities.)
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