Lazyweb Request: Heartbeat Sensor

Dear Lazyweb:

Does anyone know where I can get a reliable, cost effective heartbeat sensor? Ideally it would be something small that would not be cumbersome like the Garmin ForeRunner, and wouldn't have to go on my fingers to get a pulse. Even if that's all you know about, please share with me, and the rest of the intarweb.

Thanks!
nym

Update:
So I guess my comment system isn't working anymore unless you're a spammer. For the meantime, please email me at igargoyle nospamplease at gmail.com.

Marke writes:

radioshack # 63-1520 $49.99
My dr was impressed with accuracy
requires a band (not pictured) worn around the chest....