Recently, I was asked about posting multiple models of the same class within a form and how that can be accomplished.
The solution is to override the default name values for the form items to allow them to be presented in an array format, then in the controller, process each array item for the Class.
Lets say that I have a set of user bookmarks (Bookmark), and I want them to be able to update all the bookmarks from a single administrative page. This is a little rough, but it should explain the concept clearly: