[emory]

You might not want to hear this, but you can use emacs-style CLI input in any text field in OmniFocus just like most other Cocoa applications (with a few exceptions).

If you're in an input field, ctrl-a takes you to the beginning of the line, ctrl-e to the end, ctrl-b moves you back a character, ctrl-f moves you forward, ctrl-k clears to the end of the line, ctrl-d deletes the current line, you get it.

Up and down is ctrl-p(revious) and ctrl-n(ext) as you'd suspect ;)

I don't like moving my hands to fiddle with arrow keys and find using the emacs-style editing shortcuts a G-dsend, though my personally preference in the editor wars is for vi(m), I'll take what I can get.

Alternatively if you're really enraged about this you can use Keymando or something and create your own hotkeys that will intervene on your behalf when you use OmniFocus or other applications that are Doing It Wrong™.