Can you use a LANC controlled devise with the 7D? Something like this? VariZoom Lens Controls, monitors, Camera Stabilizers & Supports, Batteries, Monitor Kits Phone:512-219-7722 (http://www.varizoom.com/products/controls/vzrock.html)

Searched high and low with no decent results.

If not, how could you control zoom/focus the 7D out on a crane?

There are no motorized zooms (yet) for the 7D.