I've actually allowed for some slack at the wrist, so that my fingers can "rest" on the buttons. But yeah, once they're there, I won't be able to move my hand that much - I'm planning on using a custom 5 button layout (similar to where the fingers naturally rest when you place them on a table). There might also be another button for Start or Select, but unless I do some excessive finagling, there won't be a MK/Forward button.
For the connection, I actually planned on just using a long wire from one gauntlet to the other, similar in appearance to Captain what'shisname from Bleach. For convenience's sake, it was going to be a USB cable (with the male head attached to the buttons, and the female half to the PCB). But the chains idea does sound interesting.
Just for your imagination, the dimensions are: 19" x 5 1/2" x 5". The buttons' plates are located 2" from the bottom edge.
- - - Updated - - -
Got the base done - one gauntlet being out of plywood, the other out of plexiglass.