AllReality.com
The purpose of AllReality.com is to help scientists and non-scientists discuss physics and consciousness in the context of theories that explain research results in both of these fields. The site both archives the monthly meetings held by the All Reality Study Group in Santa Monica, CA, and serves as an online companion for the topics discussed at those meetings.
The site was built in Drupal 7, and includes a custom response system in which various types of responses (agreement, disagreement, etc) are grouped beneath each topic in a series of nested vertical sliding panels. The powerhouse module on this site is Quicktabs, extended by some fancy PHP and jQuery scripting.