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.

[Stephane] begs to differ, and coded this Bad Apple!! demo for the Arduino Mega 2560. For those unfamiliar, video on the Arduino is actually somewhat of a solved problem – merely requiring a ...

The Uno Rev3 is also the most popular Arduino board, so expect to see tutorials ... environmental monitor or home automation system, a Mega 2560 might be enough to handle all your components.