The South African Information Worker User Group (http://www.informationworker.co.za) is hosting some of the slide decks used in the recent TechEd Africa 2006 Office track at http://www.informationworker.co.za/Technical/Event%20Decks/Forms/AllItems.aspx
Here's a list of some of the slides that might be of interest
OFC203 The 2007 Microsoft Office System: Clients - Overview and What's New
OFC207 Microsoft Office SharePoint Server 2007: Overview and What's New
OFC309 Connecting Portals to Line-of-Business Data with the Microsoft Office SharePoint Server 2007 Business Data Catalog
OFC310 Dot-Com Meets SharePoint: Building an Internet-Facing Web Site Using Microsoft Office SharePoint Server 2007
OFC305 Windows SharePoint Services (version 3) Development: Working with Content Types, Field Types and using Feature and Solution Definitions for constructing custom SharePoint sites.
OFC308 Infrastructure Topics in SharePoint Products and Technologies: Administrative Architecture, Planning for Deployment and Advanced Administration Topics
OFC307 Integrating Microsoft Office InfoPath 2007 Forms into Workflow Solutions and Business Processes
OFC314 Building Custom Server Solutions with the New Excel Services
OFC312 Enterprise Search Technical Drilldown in Microsoft Office SharePoint Server 2007
OFC313 Microsoft Office Groove 2007: Enterprise Deployments
OFC311 Microsoft Office Open XML Formats
OFC201 Microsoft Office Live Communications Server 2005 and Microsoft Office Communicator 2005: A Technical Overview
OFC304 Microsoft Office Live Communications Server 2005 and Microsoft Office Communicator 2005: Audio, Video and Web Conferencing and Telephony Integration
OFC205 Microsoft Office Project Server 2007: Overview