I need to set up a site where about 20 people can share their photos of a group vacation. This will require a single account that will allow each person to log in and create their own album within the main account. Some people are not computer-savvy, so simplicity of use is important. Flickr does not seem appropriate - it seems that you have to upload photos first and only then can you divide them into albums or sets. Any sugestions? Thanks in advance.