Another cool project we stumbled across on Kickstarter. Wiley Davis has designed a pretty slick and inexpensive follow-focus solution for DSLR's.
For the $50 price point you get a follow-focus that's fully adjustable and compatible with any standard 15mm rod system, Wiley's even offering you a choice between 3 colorways. Check out the video for the full list of features.
You can't beat that deal with a ten foot pole.