I think it would be useful to be able to define key shortcuts which are sensitive to the context... In particular, two types of shortcuts could be used - one if FARR is visible, another one when it is not. Of course, other options (i.e. whether the active element is the typing field or the results list, etc.) would be nice, too.
For example: I have Alt-Tab defined as FARRAltTab shortcut key. It would be great if subsequent presses of Alt-Tab would allow me to move through the list of results (so it would combine the traditional alt-tabbing with FARR functionality).