I worked with Mike for several years, and also continued a friendship with him in subsequent years. As everyone who knew him has said (and will say in subsequent days), Mike was truly the consummate professional, and one of the last of the "old school" Edward R. Murrow-style journalists. The big, booming voice, the responsible and thorough pen, and near if not total on-air perfection. The man simply did not make mistakes on the air. And not only was Mike a fantastic broadcaster, he was an excellent financial planner, to boot!
All of that aside, though, much more importantly, Mike was such a caring, compassionate man. You could hear it on the air, and it simply absorbed you off the air when around him.
You may not know that Mike had recently been working on the production and distribution of his own program celebrating folk music, which was a dear passion of his. He had actually begun to produce it, and picked up carriage on several public radio stations, if I'm not mistaken.
My thoughts are with his family, who I never had the pleasure of meeting, as well as his many colleagues, many of which I did.