For what it's worth, Detroit sports writer Jeff Moss just tweeted:
There is someone EXTREMELY connected to the Michigan program who is blarghing to everyone that Harbaugh to U of M is a done deal. 9am TUE.— Jeff Moss (@JeffMossDSR) December 16, 2014
To clarify at 9am Tuesday I will tell you who is telling his media cronies that Harbaugh is coming.— Jeff Moss (@JeffMossDSR) December 16, 2014
Could just be an attention-grabbing ploy but I'm starting to wonder if Harbaugh might actually be in play for them.
So there is a new source saying Harbaugh is going to ttun. Smells like a self-promotion stunt to me though.