Well folks, the day has finally come. After seven months of work, and with the help of the talented Ladyada of Adafruit Industries, ybox2 kits are now finally available!
The kits are selling for $75 each, and include all of the parts required to build a functional ybox2.
Here is the cool part: You don't need any extra tools to reflash the firmware! The EEPROM in the kit comes preloaded with an ethernet bootloader I wrote, which allows you to upload new firmware to the device over the network! This works so well that over the past month or so I've used my prop-plug only two or three times. 90% of my development—including development of the bootloader—has been over the network.
More information is available in the FAQ.
UPDATE: The ybox2 made it on Engadget!! w00t!