To be able to test ArduinoISP/Leonardo/Arduino1.0.2/arduino-tiny, I made a small board with an attiny85, and hooked it up to my Leonardo.
Never used arduino-tiny before, I followed Coding Badly's instructions http://arduino.cc/forum/index.php/topic,132007.0.html and it all worked out of the box. Many thanks to the creators, nice job!