One company you must know about is Wallpaper Collective. This company has a ton of funky wallpaper many with bold graphics and gorgeous colors, you won't be disappointed. These are a handful of the ones I really liked from their site, you can see more here.
Also (below) a NEW collection below by UK designer Louise Body. Louise Body is known in the UK for her FUN graphic & EARTH FRIENDLY design work..
images via wallpaper collective