Customising Wiki Pages - Part 1
Some Questions to Ponder
How Wiki works in SharePoint is really very interesting. When you first create a wiki site, you will have two pages in the site. One is Home.aspx, and the other is How to use This Wiki Site.aspx. Clicking on the homepage of the site does not bring you to default.aspx, which other site template does, which you have your normal WebPart pages. Instead, it brings you to home.aspx. Does this interest you? Read on, there is more...
When you need to create a new page, SharePoint doesn't bring you to the normal NewForm.aspx as your normal lists would. Well, you can argue that Wiki Page is actually a document library, but it doesn't behave the same way as your document library would - Opening up a template in the client application. All SharePoint does is it brings you to _layouts/createwebpages.aspx, where you specify the name of the wiki page, and the content. Click on "Create", and the new aspx file is in the library, but where are the content stored?

One last thing I want to show you before I start to dissect. Go to the homepage, and click on Edit. Notice that it brings you to your normal EditForm.aspx? Now, can you figure out where are the content stored now?
Next up, knives are ready...