ℹ️ You can also get examples provided with the library in the Arduino IDE through the menu File > Examples ... can use the "Generic View" in the GPIO Web Application to see GPIO pin activites live ...

It’s a significant update. The Arduino UNO and Arduino Mega 2560 update the Duemilanove and Mega respectively. They now use an ATMega8U2 instead of an FTDI USB to serial converter chip.