Top-level pages appear as separate Sakai tool instances so they are in the left margin.
When first going to a new page, you are put into this page (with no content, obviously).
The normal FCK. There is a page property to control whether to filter HTML (not yet shown in the UI).
You can upload a file or supply a URL. These are currently shown in a new window.
When you first go to it, you have a blank page editor.
You have to create the assignment in the assignment tool first.