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.

The Arduino Mega is a useful tool for the maker. Generally, once one has come up with plans for blinking LEDs that require more IO than is available on the Arduino Uno, one graduates to the Mega ...

Factor in the low prices of Arduino boards, and it’s clear why they’ve remained the most popular microcontroller family in the consumer space. Although the Arduino Uno can power a host of ...

There are at least 20 different ones available in the Arduino ... Mega 2560 might be enough to handle all your components. If you're looking for something more similar in form factor to the Uno ...