XWIKI implementation plan

Hi, just recently join the list. I wonder if anyone have specification/implementation plan written for xwiki. I am thinking alone lines of: 1. quick overview of what wikis are: few lines 2. Wiki business benefits 3. What kind of open source wikis available and what do they offer 4. Why xwiki is special 5. xwiki software model. : how the layers are arranged 6. Extensibility of xwiki. Future of xwiki etc 7. Brief outline of wiki structure for software development shop 8 How to handle ongoing maintenance and care thanks rukka