ATTiny25/45/85 + AVR-Doper or USBasp = very little board added

Based on a port of the Arduino core libraries created by Alessandro Saporetti and slightly modified by HLT, new hardware has been added to the upcoming Beta: the ATTiny25, ATTiny45 and ATTiny85 microcontrollers, running @ 1MHz with their internal osc. These incredibly useful, yet small MCUs, can be programmed easily with some external programmer, such as the open source AVR-Doper or the USBasp.