I thought it would be an interesting project to work on the MIA from Wisconsin until I found POW/MIA Wisconsin It turned out to be much too big of a project for me to do.
Instead I'm just going to list this website for every one to do their own research.
The home page is U.S. Defense POW/MIA Accounting Agency
You can Search for the missing all wars all states.
As they find a MIA they make a short Bio like Army Pvt. Roy Brown, Jr., 22, of Des Moines, Iowa, I'm not sure how long they keep them on line
I hope this is useful for those working on MIAs. This site might be listed somewhere on the Military and War Project or the Missing in Action but I couldn't find it.