Hey all, saw this interesting article. John Gruden Jr. made a comment about his dad going to San Francisco. Take a look.
http://www.nbcbayarea.com/news/sports/Jon-Gruden-Jr-Links-Dad-to-49ers-Job-111493969.html
It sounds very vague. However, contrasting the SF job with the Miami job which Gruden clearly didn't even consider, it gives some hope to the idea that he is at least thinking about coming back to the bay.