I just seen this thread. Yes this is a truly sad news to hear. I have always loved 808 States covers and Johnson and Panas have been a big influence on me in designing covers for the website. I always credit them on my designs where I have used or been influenced by their work and logos.
I am not familiar too much with Tony's work other than 808 State's sleeve designs but a very gifted graphics designer non the less. He will be missed.