We are currently carrying out a review of the website design. There is a list of requirements here (TTBwebsiteRequirements_20120605). Do send any new requirements or comments to me, at firstname.lastname@example.org.
Also, there is a general specification for a Transition Town website which is being developed. This is to form the basis of an ‘out-of-the-box’ website for new Transition Towns. You can view this specification here.
If you would like to be involved in designing or managing the website, please contact me.
There’s also an interesting Druple Transition group (Druple is a type of website platform): http://groups.drupal.org/transition-towns