The SharePoint team has posted videos and white papers to the TechNet site.
Overview: Office SharePoint Server server farm architecture
Describes how to plan server farms for reliability and scalability, and how to deploy Office SharePoint Server 2007 and Windows SharePoint Services 3.0 on a server farm.
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Overview: Configuring server farms
Describes configuration steps needed for server farms after deployment.
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Securing server farms
Describes how to help control access to information and how to help protect deployments from malicious users.
Configuring performance options
Describes how to set up caching, IIS compression, and other options to help maximize performance of an Office SharePoint Server server farm.
Backing up and restoring Office SharePoint Server server farms
Describes how to back up and recover Office SharePoint Server server farms.
Operations and management
Provides information about common operations and management tasks.
Capacity planning
Describes how to determine requirements to support your capacity requirements.
Search architecture and configuration
Describes how to plan for and configure search for Office SharePoint Server.
Here is the link to the actual page in TechNet.
http://technet2.microsoft.com/Office/en-us/library/f27b1c10-aa0f-421b-8c8f-0ed52be863d71033.mspx?mfr=true