I am a member of a now defunct Drupal community at Edublogs Community. It was set up so we could only create blog posts or pages. For a long time I didn't realise it was Drupal and it was only when I recognised one of the themes that it became clear to me. The community was meant to act as a meeting point for people with blogs hosted by James Falmer's Edublogs but it never really took off. Most posts were asking for technical advice, hoping for a response from James himself. All the blog posts went on to the front page so I decided to use it to advertise my blog and later the degree exhibition. This did actually work people followed the link to the Classroom Displays blog in my sig and some people did come to the exhibition from there too.