Not trying to use the Forums to "advertise" anything but since some folks ,friends , were asking me about Polar's new power sensor technology I thought I 'd show that the public announcement was just made ..

http://www.polar.fi/en/about_polar/news/Polar_and_LOOK_launch_together_power_pedals

and also on Bluettooth technology transmitter...
http://www.polar.fi/en/about_polar/news/new_heart_rate_transmitter_with_Bluetooth_wireless_technology_introduced