> (various?)

*I* can spell. My keyboard can't, though. ☺

> why not change your EDITOR variable to be a script
> that uses B to get the file into sam,

This is the easy part.

> and some other
> signal or watchdog to get it back?

This is the hard part.  It happens that if I do something like this
with mush, and simply wait until I've finished with the editor, I'm ok,
but it's pretty fragile.  That's why I was wondering if someone else had
beat me to inventing this wheel.