The Chicago Tribune posted an article on Friday about his passing, as did the Chicago Sun-Times. You can gain some insight into Jason as a writer and improviser from the man himself, on his WordPress blog, or his book Long-Form Improvisation and The Art of Zen. (See the link to the right if you want to check it out.)
Finally, the Whether the Weather documentary team interviewed him a couple years ago; see the playlist of clips from his interview below.
Last Thursday, January 8, long-time improv Olympic teacher and performer Jason Chin passed away from what is suspected to be heart failure. iO founder Charna Halpern announced it on Facebook, and the news broke on media outlets shortly thereafter.
Jason was an improviser and a coach, but more than that, he had a wonderful but realistic vision for improv as an art and a business. He was Training Director for improv Olympic for eight years, and during his tenure revisited things like what skills are important to teach first to new improvisers. Many students and now professionals have come through the iO doors, and his impact will be felt on improv and entertainment for years.