A chapter in Game Programming Tricks of the Trade showed me how to do this very simple example (essentially 2 textures, with a mix of grass and rock at lower elevations and just rock at the higher elevations. The grass is from the book's CDROM and the rock texture is something I made with a digital camera. Next step is to create a skybox for the background.
I'm not sure how I feel about the book, it has too much fluff in it and is expensive (I would have felt a bit ripped off if I hadn't found a really cheap copy at a discount book store). It does have a few good chapters though.
I'm also thinking about picking up a copy of Focus On 3D Terrain Programming by Trent Polack.
