@AC: Re: This is what makes me laugh / cry...
>Really? .Net 4.0 solid?
Sorry to disappoint you, but the Microsoft.Office.Interop.Outlook is not actually part of the .NET framework, it's actually a referenced COM object (as heavily implied by the error of System.Runtime.InteropServices.COMException). The interop namespace should give away that it's not part of the framework.