The default layouts (left & top respectively) are here:
Here's a left navbar, with HoverNav hooked up on the home image. To use this layout, you have to also select the associated CSS in the dialog.
Here's a left navbar, with a Find Notes link.
Here's a left navbar, with a Get Mail link.
Here's the layout for the Anonymous user:
Here's an empty layout, for use with hosted accounts. If you don't know what that is, don't choose this skin.