Just in case someone wants to build their own dyno here is a good link: https://www.youtube.com/watch?v=XUX_YWsECWs
Here is the link for the software (it's free): https://sites.google.com/site/simpledyno/home
Yup it's that smart frog.
The guy needs some corporate sponsors I think. He's got brains, you can tell.
Best part is that he knows how to post vids -- straight to the point with no blah blah until it's done.

Homemade brake dyno: https://www.youtube.com/watch?v=q-UFHcNSht8