Ok, ok - we've been getting requests (no; more like demands) that we offer a bit of a deal for getting the GM15's in pairs.
Alright then. How does $30USD or $40Cdn a pair strike you? Ok, now let's see some nano-sumo robots!
"Wot's this? A microcontroller at Solarbotics??" Yup. The Atmel ATMega8L is part of our Sumovore Atmel Brainboard, and it's simply a really solid microcontroller with an excellent (free) open-source C++ programming environment. Of course, you won't see us running a solaroller with one of these, but this microcontroller is finding uses at Solarbotics.
Embrace the power of the Dark side, Luke...