We are not sure about existing Arduino boards, but the last six bytes of EEPROM have a unique serial number. At this point, the Mega 2560 has some kind of issue with gcc on certain platforms and ...

The Arduino Mega is a useful tool for the maker. ... and coded this Bad Apple!! demo for the Arduino Mega 2560. ... but by streaming data off an SD card or serial link.

Meanwhile, the Arduino Mega is getting the same USB chip along with an ATMega2560 processor with twice the memory. Right now only 128K is available, but that's a software limitation and they're ...