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I wouldn't have exact content.  If it is just one website use the same site structure but change the content.  You can vary your content and messaging, but portray the same theme.  Google doesn't like duplicate content anyway you look at it.  Just my opinion though.

This might be worth watching. If my memory serves me correctly there was talk about that in here http://www.seomoz.org/webinars/getting-value-from-xml-sitemaps

Thank you Bevelwise that makes sense.