Spoonflower now has create your own wallpaper just as they have had create your own fabric. I have ordered their fabric before and I was happy with the quality and their service. So I thought I would share with you some of the options already designed, and of course you can always create a complete custom design on your own.
All sources for wallpaper designers can be found here.
The wallpaper is removable, PVC free and eco-friendly. The best part is its $60 a roll or $5 a linear foot. I always fall in love with extremely expensive wallpaper that I cant justify spending all that money on, now I can create something similar for less!