Some questions about development of "ArcGIS"

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Some questions about development of "ArcGIS".


Problem one:
Use "ESRI API" (ArcGIS for Silverlight, ArcGIS for Winform API) , call "Google" , "Bing", "ArcGIS Online" services , Thinking is this???? Realize the map navigation.

Problem two:
We have "ArcGIS 10.0" client software "license", whether can use "ArcGIS" fee services???

Problem third:
Use "ArcGIS 10.0" client software built data model and so on , whether we can upload to the "ArcGIS" official website. And then develop our own service, then be called and in the application be used. For example: a "GIS" information of campus .

Problem forth:
Use "ArcGIS 10.0" client software built data model and so on deploy on local database . "On the local server" whether can also releas e services and use the "ESRI API" (ArcGIS for Silverlight, ArcGIS for Winform API) , "in the local area network" development "AcrGIS" applications with the local server service? ??


For example:
In a campus, use "ArcGIS 10.0" client software create the local database, the map model, and then release services. And the services be used by applications ,such as "Silverlight, Winform, Web", etc. But shall not upload the data to "ArcGIS official website", Is that OK? ?


My understanding of AcrGIS not many, thank you very much...