If I click "Manage Applications", I see a list of applications for iOS and Mac OS. Clicking on one of them leads me to the summary page for this application. This resume page lists SKU, Bundle ID, and Apple ID for the application. This is true even for an application that is not yet available for sale.
As for the change, I see no way to do this, and my suspicion is that you cannot. SKU is used to identify the application, so I believe that the intention is that it should remain unchanged for the duration of the application.
In addition, if you check the developer forums and search for SKUs, you will see several people say that you cannot use SKUs again to reinforce the idea that they cannot be changed for the application after they are installed.
Jon steinmetz
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