I found this information on Cisco's site:
"The WLAN devices are safe when operated under normal operating conditions as stated in the user manuals. The power levels are below the power level of a typical microwave oven. The radio modules were tested in accordance with various recognized standards by independent test labs. The levels measured when the PCMCIA antenna was 1 cm away from the user was recorded at 10-12% of the maximum level allowed."
