Is there any way to organize photos in the Photostream section of Flickr? I would like to have it filled with folders with different groups of photos. Instead, every photo I upload ends up in an unmanageable mess. Let's say you have 1,000 photos uploaded, they're all right there with no organization.
No. Photostream is a view of all photographs in the account. Flickr offers Albums, Galleries, and Collections, where you can arrange groups of photographs together as you'd like, but the photostream (and once it comes out of beta, the Camera Roll) will, according to Flickr staff comments, always be the full view of any photographs set to be publicly available.