I am very excited to share that Microsoft announced the public beta release of Office 2010, SharePoint Server 2010, Visio 2010, Project 2010, Office Web Apps for business customers, and Office Mobile 2010.
If you are developing application based on Outlook; then here are few links related to developing applications for Outlook 2010:
If you are looking for resources to learn more about Office 2010. Then the Office 2010 Developer Workshop includes videos and presentations @ Office 2010 Workshop. This content is designed to help you get started developing solutions, from Add-ins to full featured Office Business Applications (OBAs), using Visual Studio 2010 with Office 2010 and SharePoint 2010 as the core platform.
So, what are you waiting for? hit the road with Office 2010 Developer Roadmap.
And to complement it we can download Microsoft Visual Studio 2010 Professional Beta and refer to
Visual Studio 2010 - What's New in Office Development as well.