Engadget - It's not often that a product takes two full years to go from announced to shipped, but such is the case with Finis' Aquapulse. For those who weren't exactly paying attention in April of 2009, the aforementioned company busted out a head-mounted device that relies on an Infrared sensor to monitor heart rate via your earlobe. Said rate is then communicated to you in real time through bone conduction technology.
