Paul Grayson of Pololu wrote to let us know about their 3pi robot. The 3pi is a tiny (9.5cm) differential drive robot loaded with an AVR ATmega168 microcontroller, five sensors, LEDs, pushbuttons, a buzzer, and an LCD. You can program it in C using the GNU gcc toolchain, which is free software. You'll also need an AVR ISP programmer to load your programs onto the AVR. Polulu offers a combination deal that include the robot, programmer, and cables for $119. If you already have an AVR ISP programmer, you can get the robot for just $99. The 3pi looks like a cool little robot and we look forward to posting a full review of it if we can get our hands on one.