How to export an entire Access database to SQL Server?

Is there a reason you don't want to use Management Studio and specify Microsoft Access as the data source for your Import Data operation? (Database->Tasks->Import, Microsoft Access as data source, mdb file as parameter). Or is there a reason it must be done from within Microsoft Access?

There is a tool from the SQL Server group - SQL Server Migration Assistant for Access (SSMA Access) There have been comments stating it's a better tool than the Upsizing Wizard included in Access.