One of the most popular choices is the Custom Map Wallpaper. They can create the map wallpaper based on any postcode/zipcode in the world. Simply send them your wall dimensions, choice of area and radius and they will send over a quote and proof by email.
You can even customise the maps with your favourite color or match it to your interior color scheme.
The best part is readers of A&B can get 10% off the Custom Map Wallpaper.
Just use the code "ABC13" when filling out the map proof request here: http://www.wallpapered.com/custom-map-wallpaper