What I have in mind is a mod that displays what actions the player is currently capable of performing a-la http://www.gamingheaven.com/gamingreviewimages/assassins_creed_pc/2.JPG along with 1-4 on the hotkey list similar to how the Zelda games present what is currently available on C/XYZ/B. The context sensitive bit would work by displaying specific 'buttons' based on a modifier key, similar to how it works in Creed and also games like Phantasy Star Online.
I imagine this would be a job for OBSE/MenuQue but I really have no idea. I don't even expect anyone else would be interested in something like this, but I figured I'd put the idea out there anyway.