You can mouse over the logout link and see that it links to /Logoff.aspx
However the current functionality is to redirect to the home page after logout. Logout.aspx just clears the authentication and role cookies and redirects to home. It should be obvious to the user that they are no longer logged in since the welcome message no longer shows their name and the login link is visible and the logout link is not visible.
I will log a request in our project tracker for a config option to allow not redirecting and instead to show a message confirming logout on the Logoff.aspx page or maybe a config option to control where it redirects after logout.
I cannot promise how soon we will get to this though.
Hope that helps,