I would also LOVE to see John Carter of Mars on the big screen... And speaking of the character, another movie that I think would be awesome would be Heinlein's "Number of the Beast." What a mind twister that book was, and I think that it would adapt itself quite well to the screen.
Mark
A lot of people wouldn’t consider John Carter of Mars as Sci-Fi, but the God’s of Mars creeped me out. As a teenager, I would sometimes stay up all night to finish one of the novellas. Giant six armed apes and beautiful princesses (the cover paintings were like soft porn too ;) ).