Hi all,
thorwing my hat in here with a "me too" on the clicky-no-rebooty.
I tried updating to the new firmware as per Gabriel's posts and it wasn't sucessful. System profiler says I'm at version MP11.005C.B08, SMC 1.7f10.
I'm getting the same symptoms as Peter, diag LEDs 2&3 blinking and then a never-ending clicking coming from the optical drive or the power supply while the poor thing tries to reboot.