Guys, Great feedback so far and some great suggestions. I was trying to keep it
simply but some of the suggested features sounds like must haves. The +5v
at a minimum.
I was thinking that it would be used in a second extender card so all the other features
like LED's, power etc come from another source. Second extender card would sit in
front of the first with break out board so keeping the height to a minimum was important.
Sorry for the bad pic. That was just a screen grab from Kicad. Here's a better pic from FreeDFM: