I maintain two (early stages) websites that use Wikka for mainly the back end. It is awesome how quickly I got these up using Wikka: [[http://www.knowledgeofasia.com/ | KnowledgeOfAsia]] and [[http://www.rsschomp.com/ | RSSChomp]] More about me here: [[http://www.ashworthdigital.com/ | AshworthDigital]]