The latest revision of the "Multipoint Wireless Sensor Network V1 Instructions For Use" is available at http://www.logicatronics.com
MWSN is a Rapid Telemetry System consisting of mbed, XBee and Arduino FIO hardware with our firmware. For non-commercial applications, the firmware is free of charge as is the Pachube online data service.You construct MWSN your way: DIY with modules on breadboard, or you can purchase ready-made PCB hardware for expediency.
The new documentation reveals the latest developments of our Sensor micro-shield for the Arduino FIO, and changes to the connectivity.
A prototype of this system has been on test since November 2011 and is a very reliable product. See for yourself here: https://pachube.com/feeds/41029