The map base below is one of the most creative uses of Google Maps we've ever seen. The developer replaces the entire Google Maps image sets with custom water color images. If you look carefully, you can pick out repeated patterns when zoomed out. It is an impressive use of the API's that Google lets developers manipulate. Check out the original post at Google's Geo Developers Blog for more information. Be sure to zoom in and out to watch how the colors and patterns change at various scales.