Tripleshot Cycling

New release:

http://garmin.blogs.com/pr/2011/08/garm ... ctor-.html

It'll work with the Edge 500/800.

Oops, what Garmin means is they're nearly almost sort of close to releasing (blush- should have read a bit further first):

Garmin unveils Vector at upcoming shows
We're still cranking away with refinements to Vector™ so we can bring pedal-based power to the market soon. As you likely know, Garmin acquired MetriGear in September 2010, and since then we've been working toward a complete package that pairs our unique power solution with Garmin's suite of fitness devices and tools.

Cheers,
Chris

Too expensive