I have always loved his poems, and remember vividly the four or five times I saw him read when I lived in Amherst. Had I known it was his 90th birthday earlier this month, I would have baked a cake. At the very least. Here is a great article about him: http://online.wsj.com/article/SB10001424052748704150604576166452338502880.html
Now I must go get out The Mind Reader and Walking to Sleep again....for starters.