Yoshi designed a Arduino Leonardo clone called the Leonard Pirate. It uses an ATmega32U4 with hardware USB peripheral. 6 analog and 18 digital pins broken out to headers.
The board is designed with 2 choices of USB connectors. Use a USB A-type male connector that plugs directly into the USB port, or a mini-B female type USB that uses a cable.
Since it is AVR based it can also serve as a Bus Ninja clone, which in itself is a Bus Pirate AVR clone. We met up with Yoshi at the Make Tokyo Meeting 07 and had a great time talking about this project.
there is a easy clone “made with paper” (1 layer board)
http://translate.google.com/translate?u=http%3A%2F%2Ftxapuzas.blogspot.com%2F2009%2F12%2Fpaperduino-leonardo-clon-de-arduino.html&langpair=auto%7Cen&hl=en
(From Spanish->) http://txapuzas.blogspot.com/2009/12/paperduino-leonardo-clon-de-arduino.html
There is the cool vinciDuino . Fully open source project with the same pinout of Leonardo.
There is a second one in Spain made using a Factory PCB.
https://bitbucket.org/fmalpartida/vinciduino/wiki/Home
http://arduino.cc/forum/index.php/topic,78781.0.html
All Three links posted are about the same board: the vinciDuino.