Dayviews (previously Bilddagboken or BDB for short) is a Swedish photo diary community. The site has over 268 000 000 uploaded images and 1 335 000 users.
When I came in contact with the apps creator, Joakim Berglund, the app was still at a very early stage and totally unofficial. It didn't take long before the creators of Bilddagboken found the project and offered Joakim a "summer job" at their office to complete the app. I haven't been involved in the project since then and the UI have changed a little since my versions (seen below).