There is an extensive interview with Robert Polidori in this month's Bomb magazine, available at most Borders and B&N stores.

It deals mostly with his philosophy and has no technical info, but there are a few photos never published before (the author commissioned him to photograph a small North Dakota town) as well as some from each of his books, including 2 from his work at Versailles.

I'm going through a Polidori phase right now, having just purchased Havana and After The Flood.