I think its a neat idea. I had a chance to get an old coke machine from the 70's but didn't really have a place to but it in the garage.
I know a guy that used to run a bar or had a friend that ran a bar...I don't remember which, but anyway, he had one of those industrial strength aluminum margarita machine. I would like some thing like that....and find away to mount in the freezer section of the of fridge.
It would be neat to combine that with a barmonkey. If you had a big enough fridge, you could fit a keg, or at least a pony keg in there to for a kegerator.
BTW, good on ya for doing this and offering to share, but I think you might be over thinking the can holder parts and dispenser assembly

Check out Toby and the inards of his machine. What I figure you need is an assebly that will not only hold all of those cans as shown, but will also allow a switch to release one can at a time.
edit 1 to fix the picture positioning.
edit 2 add this link
http://www.bitw.com/bitwrestorations.htm Check out this page
