I'd love to see Kij Johnson's Fudoki as a film. Casting big names might be difficult at first, though, given that half the cast at the beginning of the book are cats.
Failing that, I'd like to see either a big screen or series version of Anne McCaffrey's Dragonriders of Pern books. I think that a film/series was being planned at one point, but I've no idea whether it's still going ahead or not.