Synopsis of "Creating Office 2010 Add-Ins using SharePoint as a Data Source" - SharePoint Conference 2009

Totally lame - don't waste your time.  The presentation was filled with fumbles and errors - a lot of people left in the first 20 minutes.  I stayed for the whole thing, and I didn't feel like I learned much or that I was excited about anything.  Basically, you can connect your Office 2010 add-ins to SharePoint data, and with SharePoint 2010, you can do that using the much easier-to-use client object model.