I just love this Vargas pin-up wallpaper that I found at London's 55 Max website! The site will actually custom make any design for you in 2-3 weeks for about £45 (US$93.00) per roll. All you do is mail them the images (photographs, sketches, drawings, CD covers, etc) and they will take care of the rest. Their standard wallpaper is 210 grams per square metre by the way. All they need is you to choose your favourite design then measure the width and height of the wall - could not be much easier and voila, custom wallpaper!
Available via 55 MAX