Terry
Your test methods look very good and the way you did the board makes a lot of sense.
I helped develop the official test suite for Arduino, if you could re-write your test using the standardized testing library, we could incorporate it into the full test suite. Your test would stay the same, the only thing that would change would be the format of the output.
http://code.google.com/p/arduino/wiki/ArduinoTestSuite
Mark