A shortcut to reopen recently closed items

That's tricky - depending on the program, running an instance of the program which was managing the closed window might not be enough. For example, most browsers have a "reopen closed window" option, but without being familiar with the specific browser, the tweaker won't know how to restore that closed window. Another example is Notepad - how would the tweaker know which document was open in the Notepad window which was just closed?