I can't see this as an option so is there a way to select faces or islands and have them show up as selected faces on the object in 3D view.
In programs such as maya it is possible to work from either view and makes selection and mapping a little more user friendly.
I suspect it isn't possible in Blender but welcome your feed back.
Edited as flag as already answered, although the question was not asked in the other post in a way that showed in my search. I was looking for face and island selection to show in both views. The other asked about unselected vertices this obviously did not appear in the results.