Whatcha mean Lefty? Pin 20 on the TQFP is Aref, on the promini just has a cap to ground.
I thought I was agreeing with your prior statement, Aref pin (on whatever package) can not be used as a general purpose I/O pin to the best of my knowlege and I did quickly check the datasheet but could be wrong. However the reset pin can be reused to use as I/O but that brings lots of arduino IDE compatiblity problems along with it.
Or maybe I'm just not paying close enough attention to the post/question (again!) ???