additional links to complement episode 13.. I realized that I'd left a lot out when I played back what I'd said about the project I was working on..
The Cisco LBS accuracy is stated as being within 10 meters 90 percent of the time
Wi-Fi Location-Based Services 4.1 Design Guide
Recommendation for re-calibration semi-annually in an active logistics shipping & receiving area
Minimum signal level thresholds
Access point placement
Tips for successful (client) calibrations
"First and foremost, it should be clearly understood that 802.11b asset tags that transmit tag messages using Layer 2 multicasts (and do not attempt to associate to any WLANs) will not cause the initiation of any 802.11g protection modes under any circumstances. This includes asset tags operating in strict compliance with version 1 of the Cisco Compatible Extensions"