WordPress MU across fifty sites

Wnet.org and Tierra Innovation

The power of WordPress as dual action blog/CMS.

http://wordpresspublishers.files.wordpress.com/2009/07/wpmu_cms_casestudy-wnet-tierra-07-16-091.pdf

http://publisherblog.automattic.com/2009/07/16/fifty-sites-ten-months-one-cms/