Today we released the Microsoft Office 2010 Primary Interop Assemblies (PIA) Bootstrapper Installer which adds the Microsoft Office 2010 Primary Interop Assemblies to the Prerequisites Dialog Box in Visual Studio 2010 or Visual Studio 2008. Then when you deploy with ClickOnce or Windows Installer, you can select this option to deploy the Microsoft Office 2010 PIAs to end-user computers.
Make sure to read the instructions on the download page in order to properly set up the bootstrapper to appear in Visual Studio. Now when you create Office 2010 solutions with Visual Studio 2010 you can select to deploy this prerequisite component with your solution to your end users.
For more information on developing Office solutions with Visual Studio please visit the Office Development with Visual Studio Developer Center.
-Beth Massi, Visual Studio Community