Not Applicable.
Useful concept; but what I like more is being able to change what the microphone jack on a laptop does. Of course that doesn't get you as many jacks as today's woot. What the mic jack does, at least on the Macbook Pro's, is configurable at least, by accident, in software.
(Early Linux drivers for the Macbook Pro's had the microphone jack as a headphone jack. This is the only basis for this speculation. Whether this is actually possible remains to be seen.)
