Just when you thought you had them all, the Arduino mutates yet again –

The new Arduino Nano is the smallest and most versatile Arduino board yet. Designed and manufactured by US-based Gravitech, it has all the functionality of an Arduino Diecimila in a compact, breadboard-ready design. The Nano includes an ATmega168 microcontroller (w/ bootloader), integrated USB (FTDI chip) w/ Mini-B jack, a full complement of i/o pins (including two more analog inputs than the Diecimila), an ICSP programming header, and on-board regulator.

Like the Arduino Mini, there’s no room for a DC jack, but those extra analog pins are a nice touch. Other highlights include – auto power source selection (no need for an “EXT/USB” jumper), color-differentiated LEDs (green TX, red RX, orange pin13, blue PWR). And notice, in the upper-left, the long-awaited ‘DORX’ pin! (kidding, kidding) – Arduino Nano

Update: The Nanos ship from Gravitech in June – Arduino:Blog

In the Maker Shed:
DC Boarduino