Something struck me as I was reading Come Back to the Killing Ground, Alice (in Manna from Heaven). In it, zelazny uses intelligent black-hole based computers. it was only recently that someone at Ohio State proved that you could use black holes as computers. One of the many reasons I like Zelazny...greater knowledge only leads to greater enjoyment.
To me, it seems like one of those extraordinarily perceptive predictions you get in SF sometimes, but I don't know if anyone else noticed.