Harry Harrison - The Stainless Steel Rat (gloriously cheesy space opera)
I'll throw another vote in for the Asimov books, Foundation series as well as Caves of Steel etc.
The Larry Niven known space books (any of them) would be awesome.
I know -- Dune was a major disappointment -- it says something when the "made for TV" version on the SiFi channel was better than the movie.
Now, it you want to talk Larry Niven and Jerry Pournelle, I would LOVE to see "The Mote in God's Eye" and "Footfall" ... maybe even "Lucifer's Hammer" (but that sort of tale has been told a few times)
How about Ender's Game (Orson Scott Card). I also vote for Moon is a Harsh Mistress, if they could do it right. They never did get the movie version of Dune right. From Larry Niven, maybe Ringworld or one of the Man-Kzin Wars books.
I don't remember remembering those ones, but after reading the synopses (Is that plural of synopsis?), I remember the characters Elijah Baley and Daneel Olivaw,so I must have read it at some time in the distant past.
Wikipedia says that "The Caves of Steele" was adapted for TV as part of an early 60's BBC anthology series.
Hi Hoyt -- I did think about "The Moon is a Harsh Mistress" (which is one of my favorite books) ... I'm just worries that they woudl mess it up as a film in the same way that they messed up "Starship Troopers" because they wouldn't capture the "politics" of the situation...
Re "Stranger in a Strange Land" ... I personally would love to see that as a film along with "Time Enough for Love" ... but I don't think we'll see either in my lifetime...