A quick post, as I didn't find any others out there giving all the details you may need. SQL 2008 SSIS supports the Office 2007 file formats, but requires the Office 2007 System Driver.
If you deploy a package onto a machine without these drivers, you get errors like the following when the component is validated:
SSIS Error Code DTS_E_OLEDB_NOPROVIDER_ERROR
The requested OLE DB provider Microsoft.ACE.OLEDB.12.0 is not registered
Hresult: 0x80040154 Description: "Class not registered"
Installing the Office 2007 System Driver should fix this.