I've just launched the new website for St John's College JCR at http://johnsjcr.org.uk/. It's based on Drupal 4.7.3 with a lot of extra modules added, but mainly based on the Organic Groups module. This helps to organise all of our little subcommunities and groups. I also hacked together a custom module called groupforums, which displays listings of one of the OG node types as conventional forums, in order to help people get used to the site.
