OBA Web site: www.obacentral.com

Office Business Applications Developer Portal: http://msdn.microsoft.com/oba

MSDN Architecture Center: http://msdn2.microsoft.com/en-us/architecture

Steve Ballmer talks about S+S in Office 2007:

http://www.news.com/1606-2_3-6182663.html

MSDN Office Developer How-To Center:

http://msdn2.microsoft.com/en-us/office/bb266408.aspx

Office Developer Webcasts:

http://www.microsoft.com/events/series/officedeveloperlive.mspx

How Do I? Screencasts: http://msdn.microsoft.com/office/learn/screencasts/

Office SharePoint Server SDK (download; contains the Microsoft Business Data Catalog Definition Editor): http://www.microsoft.com/downloads/details.aspx?FamilyId=6D94E307-67D9-41AC-B2D6-0074D6286FA9&displaylang=en

Inside Microsoft Office SharePoint Server 2007 by Patrick Tisseghem (Microsoft Press)

Excel Services Information Center Portal on MSDN: http://msdn2.microsoft.com/en-us/office/bb203828.aspx

Architecture of Excel Services: http://msdn2.microsoft.com/en-us/library/ms499729.aspx

BDC SDK: http://msdn2.microsoft.com/en-us/library/ms563661.aspx

BDC Information Center: http://msdn2.microsoft.com/en-us/office/bb251754.aspx

Using the Business Data Catalog and Smart Tags with the 2007 Microsoft Office System (article, white paper, and code sample): http://msdn2.microsoft.com/en-us/library/bb608684.aspx

MSDN/TechNET BDC Forum: http://mssharepointforums.com

Inside Microsoft Windows SharePoint Services 3.0 by Ted Pattison and Daniel Larson (Microsoft Press)

Microsoft SharePoint: Building Office 2007 Solutions in C# 2005 by Scot Hillier (APress)

Office SharePoint Server SDK (contains the WSS 3.0 SDK): http://www.microsoft.com/downloads/details.aspx?FamilyId=6D94E307-67D9-41AC-B2D6-0074D6286FA9&displaylang=en

VSTO for Mere Mortals: A VBA Developer’s Guide to Microsoft Office Development Using Visual Studio 2005 Tools for Office by Paul Stubbs and Kathleen McGrath (Addison-Wesley Professional)

VSTO Developer Portal: http://msdn2.microsoft.com/en-us/office/aa905533.aspx

OBA team: http://blogs.msdn.com/oba

Joanna Bichsel: http://blogs.msdn.com/Joanna_Bichsel/

Javeds: http://blogs.msdn.com/javeds/

Microsoft Visual Studio Tools for the Microsoft Office System: http://blogs.msdn.com/vsto/

SharePoint team: http://blogs.msdn.com/sharepoint/

Patrick Tisseghem: http://www.u2u.info/Blogs/Patrick/default.aspx

Cum Grano Salis: http://blogs.msdn.com/cumgranosalis/default.aspx

Luis Bitencourt-Emilio: http://blogs.msdn.com/luisbeonservices/

Excel team: http://blogs.msdn.com/excel/

ECM team: http://blogs.msdn.com/ecm/

Sahil Malik: http://blah.winsmarts.com/2007-4-SharePoint_2007__BDC_-_The_Business_Data_Catalog.aspx