I have been saving this image from an old Ethan Allen ad for a few years now. I think this would be such a fun DIY wallpaper idea.
Some other places I found inspiration for DIY wallpapering:
of course there's always the newspaper or magazine page route...
Technically this isn't wallpaper, but its still a cool way to create a similar look.
For directions to make your own wallpaper from inspiring fabric go here.
Another great use of paper here.
And many ideas for using maps here as well.