If yes: Where can I get the source code?
There is a link on this page to download the source code for the Arduino IDE, which includes the Serial Monitor.
What are your plans for the Serial Monitor?
Thanks, Pauls. Want to see how the communication works. First I want to use a SNES pad as mouse. Sorry about my english.
If you want to make an Arduino into a mouse, I would suggest using an Arduino Uno, as this can be made to be recognised as a mouse by your computer, completely removing the need for you to use the rxtx Java library or any Java at all, it will mean you can use the SNES pad on any computer with little fuss.
Nice, but I just got Duemilanove yet!