Office 2010 Online Developer Workshop
The Office 2010 Developer Training Kit on Channel 9 content is designed to help developers get started building 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. For example developing BI Applications with Office 2010!
Microsoft Office 2010 Beta is a broadly extensible platform for building information worker productivity solutions and developing for Office with Visual Studio 2010 Beta 2 makes this easy. There is also downloadable version of the training courses including Hands On Labs for all the training units!