A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Not really. You might be able to stop beginners from editing though.
You can edit XML to make items on a particular slide non selectable but they can still be hidden which may defeat the object. OfficeOne have a (not free) AddIn to do this called SHAPELOCKER
You could create the whole of one slide as a custom layout. Savvy users will know how to edit though.