I came across Harlequin Fabrics & Wallcoverings the other day. They carry some really gorgeous wallpaper, and there's a huge selection of it. They are based in the UK so I imagine you'd pay a pretty penny to secure any, but it's fun to look.
Here are some favourites...
Aren't they lovely? I don't think I could choose a favourite. There are just too many gooders.
Harlequin also carries fabrics and bedlinens. Pop on over and have a look. (Their children's collections are so sweet!)
Tomorrow is Friday, and that means a top 5 coming your way. (That means it has to come my way first... hmmm. What'll it be?)