SmugMug(http://www.SmugMug.com) is a family business dedicated site which offers easy, beautiful, ad-free photo-sharing.
You can retrieve images to show a single album from any smugmug account (provided those albumss are public) by simply providing the albumId and albumKey. You can get the id and key for any album by selecting that album on the smugmug site and looking at the end of the url, it is in the format of it is in the format of http://user.smugmug.com/gallery/albumId_albumKey#ImageId.
You can also provide a nickname of SmugMug account to retrieve all public albums of that account. The live demo below is trieve images from http://billiejean.smugmug.com/ by provide "billiejean" as nickname.