http://www.redrc.net/2008/06/speed-passion-lipo-packs-analysis-tool/

speedpassion does!

there stuff looks pretty trick, would like to try one of those speedo's

I'll believe it when it actually hits the production floor. This website puts a lot of stuff out there like this.

and it begins, lol

I am still waiting to recieve my voltage over wifi!!! lol

I'm waiting for them to beam me and my equipment to the track, like Star Trek, so I can save gas money and time.

Although this may be useful as an "analysis tool", the title of this thread is mislabeled. From the article:
...outputting data such as Volts, Amps, Watts, RPM and KV
This is not a "dyno". It's not even an "accelerometer".
A dyno uses a controlled load to accurately determine horsepower.
An accelerometer is not a dyno. An accelerometer uses a heavy flywheel and uses mathematical formulas to estimate what the power would be. Accelerometers are usually not accurate because the load lessens as the RPM's rise.

This Speed Passion analysis tool does not provide either a constant load or flywheel. It may certainly be helpful, but don't get your hopes up. It won't determine the horsepower or efficiency of a motor.