The net abounds with sites which are almost forum-like, but are not forums per se, where posters can literally add their own pages at will - once they've registered. News sites are typical examples, where posters can upload items at will for others to comment on like a blog (e.g. Wordpress) yet they don't seem to be pure blogs either, least not to me anyways. Perhaps I'm mistaken. . . . . . .
How do these sites function? Are they .NET or PHP-based or something else entirely?