OfficeForms

After WinForms, WebForms, MobileForms, we may soon be using OfficeForms.

I think that Clemens is well inspired when he envisions InfoPath (formerly XDocs) in Visual Studio.
InfoPath is built for end-users but should be part of the developer's toolbox as well.

As Slavomir says, once this becomes integrated with Visual Studio Tools for Office we have a complete solution.