Minima is small, and I mean really really small! At only 19.8mm x 16.6mm it is one of the smallest Arduino-compatible boards going.

The Sierra Wireless AirPrime WS6318 module is designed to provide essential M2M connectivity in a small and simple package. According to the organisation, the device extends M2M connectivity to ...

Telit Wireless’ GE865-QUAD, the smallest globally available GSM/GPRS module, is the seventh Telit M2M module to be certified by Rogers. All of the modules support a range of applications such as ...

But it's possible to go even smaller, as the makers of a new Arduino-compatible product called "Microduino" show. At 1" × 1.1", it's nearly as small as a quarter.

The GSM module in action Measuring just 22 x 22 x 3 mm and equipped with Ball Grid Array (BGA), the GE865-QUAD is significantly smaller and more energy efficient than all previous models and the ...