The latest Electric Imp has already been released in Beta version and is ready to accept orders of development kits for designers.
The Electric Imp is an SD-card sized WiFi (802.11b/g/n) module with built-in antenna, 6 I/O, Arm Cortex M3 Micro-controller, and a Cloud-based infrastructure for programming and control. The I/O supports serial, I2C, SPI, A2D, D2A, and PWM interfaces. The Imp uses the Squirrel programming language, which is a small footprint C/C++ derivative for embedded devices.The design interface is done completely in the web and allows both local and server based API.
The April released version board provides SD Socket, 3.4-16V battery/DC input power supply, and USB power connections.
You can also connect your Arduino shield to the Electric Imp card. The I/O port has 0.1′ headers for efficient bread boarding and prototypes.