How do I get the Windows 7 taskbar with the Start Menu to display on dual monitors?

Actual Multiple Monitors is the only tool (that I know of) that has two Start Menu buttons.

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I believe that DisplayFusion: Multi-Monitor Taskbar is the only solution for Windows 7 that works at this moment.

While it is not possible to duplicate the Windows Start Menu, as a workaround you can use a 'faked' Start Menu by ways of a new tool bar with UltraMon.

Go to "Toolbars" >"New Toolbar"

In the dialog box point it towards "C:\Documents and Settings\All Users\Start Menu\" (without the quotes).