Would be nice, if on the code share there was a standard spot for a .jpg for svg of the circuit utilized that relates to the code.
e.g Even the ‘blink an LED’ simple GPIO code would be benefit from a sample circuit diagram showing the newbie that they need a pull-up resistor.
(may have been posted before) but this guy made a pretty good svg writing tool GUI for electronics symbols.
http://code.google.com/p/webtronics/
Failing that a section in written text that would be expected (mandatory?) on the circuit in question.