A bit off topic for XSI, but this is my home so hope you folks can help, I am after a really nice hi-res unwrapped earth map for projecting onto a sphere (obviously!) I have collected quite a few over the years but never a really good photographic one that looks good close up. I have seen some really nice ones in movies recently and have a project that I need one for now, If anyone has such an image or knows where to get one, please post!
There are huge maps of Earth. They were taken by NASA, and are more mathematically accurate than photorealistic.
However, making a realistic Earth is not an easy task, it requires also good lighting and effects settings. The link I gave you contains a tutorial to achieve a good image, but is intended for 3ds max.