As for the skin, you will find the templates and include files (widgets) that are in use on this site at this address:
http://dev.openacs.org:8000//cvs/openacs.org-dev/www/templates/
We have changed the sitemap parameter for the "Main Site" that specifies the "DefaultMaster" here on openacs.org from /www/default-master.adp to /www/templates/general-master.adp ...
Mainly take a look at general-master.adp and the files under widgets/.
