Hat-tip to Steve for spotting this new resource for SharePoint Search: SharePoint Server 2007 Search: Deep Diving,includes all of the following:

• Enterprise Search Strategy and Opportunities (SharePointServer2007SearchDeepDiveA.exe)
  This session starts with an overview of Microsoft's enterprise search strategy, reviews the various products that it affects, and outlines what is new in SharePoint Search for the 2007 Microsoft Office system. Lastly, it discusses opportunities for partners building on the platform.

• SharePoint Search Extensibility (SharePointServer2007SearchDeepDiveB.exe)
  This session addresses the core extensibility scenarios in Microsoft Office SharePoint Server 2007 (MOSS) search, such as customizing the user interface, custom search using client applications, and crawling new repositories, including line-of-business data. It also covers the administration object model.

• Protocol Handlers and IFilters (SharePointServer2007SearchDeepDiveC.exe)
  Learn about the overall architecture of Microsoft Office SharePoint Server 2007 (MOSS) search. Protocol Handlers and iFilter interfaces are described in detail with code examples.

• Customizing and Extending Search in Office SharePoint Server 2007 (SharePointServer2007SearchDeepDiveD.exe)
  Learn how to customize Microsoft Office SharePoint Server 2007 (MOSS) search user interface and build search based applications in this session. Branding, Web parts and extending search using the object model and Web services are discussed.

• Business Data Search (SharePointServer2007SearchDeepDiveE.exe)
  The Business Data Catalog (BDC) enables search to reach into line-of-business repositories and provide integrated search results. Learn about the Business Data Catalog including the design motivations, scenarios, and the apis.

• SharePoint Search Deployment Scenarios(SharePointServer2007SearchDeepDiveF.exe)
  This session reviews both Windows SharePoint Services 3.0 and Office SharePoint Server 2007 search topologies, and various deployment scenarios such as a collaboration environment, enterprise portals, and internet facing portals

The full download can be found here: download

Enjoy!