Probably you know That Arduino and Xbee isn’t a new thing, but Arduino and Xbee shield combination isn’t always handy for smaller projects. So JeeNode (v4) is all in one compact board. It contains no built in USB interface, so any external USB-TTL converter can be used to flash it.
Board is based on ATmega238 with Arduino bootloader so Arduino IDE can be used to program it. This is Open-Source design with full specs and schematics, but also can be obtained as a kit. I believe this thing could find many places where to use due to its small size Arduino programmability.