With the release of the Arduino Duemilanove, Adafruit is trying to shift out some old stock Arduino Diecimila by providing 10% off. [amk] noted that the new Duemilanove is not so much an upgrade as an Arduino with a new hat. The only modifications were autoselecting power as well as a cutable reset line. the very best part about the Adafruit sale is they’re providing Atmega328s preloaded with the Arduino bootloader as a $5 upgrade. The Atmega328 provides you twice the flash memory, twice the RAM, as well as twice the EEPROM than the original Atmega168.