I guess probably everyone already knows that he died. I think he was probably the best "hard science" author of science fiction stories and a visionary about technological issues. Anyway there is a final interview with him at this link:
http://spectrum.ieee.org/mar08/6075
I especially liked his final comment:
QUOTE
We came back to the present. He said that in many ways, being confined to a wheelchair had left his mind free to roam the cosmos. He was spending a lot of time thinking.
“My main interest is astronomy and the discovery of extraterrestrial life,” he said. “I'm sure the ETs are all over the place. I am surprised and disappointed they haven't come here already—assuming they haven't. Maybe they are waiting for the right moment to come. And I hope they are not hungry!”