Microsoft has released new Outlook 2007 Sample Add-Ins for C# and Visual Basic .NET

The Outlook 2007 Sample Add-Ins are a learning tool that will help you understand some of the important new features in the Outlook 2007 object model. They provide coverage of the following important new areas:

Using the Rules object model, which allows you to programmatically create or access most rules supported by the Outlook Rules Wizard (Rules sample)
Implementing a form region for an Outlook contact item (Travel Agency sample)
Adding a custom task pane to an Outlook AppointmentItem (Prepare Me sample)

Outlook 2007 Add-Ins: RulesAddin, TravelAgencyAddin, and PrepareMeAddin