I just stumbled across this on vimeo and it looks like a great idea, lets hope it comes to market.

Here’s some info from the creator…

“This pre production demo show what the new INTUIT FOCUS v.01 (beta) is capable of. It is wired follow focus unit for those who tend to use new DSLRs on their rigs, Steadicams or any kind of dollies. This product will be coming in 2 versions, with 1 controller and 1 motor or 1 controller – 2 motors for easier and faster switches between setups.
Currently INTUIT FOCUS is in it’s final test faze and it will be ready for sale via IF web site.
If you need some additional specs and info – contact me via email: marko@butrakovic.com
THX.”

If you would like to follow the development progress of this device the creator is using the comment system on Vimeo to answer questions.  http://vimeo.com/9827192