I received my Diecimila now, and did all the beginner stuff like blinking and light sensing etc.
However I stumbled over the servo control.
This pages says that it uses a library which is by using direct pulses much more acurate: http://www.arduino.cc/playground/ComponentLib/Servotimetimer1
However the link seems to point to the "normal" servotimer library (0-180° rotation). With this library my servo movement is very shaggy.
With the code from: http://principialabs.com/arduino-serial-servo-control
I get nice and smooth movement, perfect speed control with "hacked" servos, but it is software and not in hardware like the one above...
Any hints where to get the more precise lib?