Open source Wireless sensor platform - Waspmote
Waspmote may have two radios at the same time connected when using the Expansion Radio Board allowing the creation of bridges among different networks such as ZigBee and Wifi, Wifi and 3G/GPRS, RFID and Bluetooth, etc.
Cooking HacksĀ - Tasty Electronics for the Arduino and Raspberry Pi Community.
The have a wide range of electronic products and kits including Arduino, ZigBee, GPRS, Sensors, Servos, Leds, LCDs etc.