The following Virtual Labs are available online and free of charge (Registration is required) through TechNet and MSDN. Each lab runs for 90 minutes. TechNet (click here):

• What's New in Microsoft Office SharePoint Server 2007 Feature Walkthrough
• Microsoft Office SharePoint Server 2007 Installation and Configuration
• Microsoft Office SharePoint Server 2007 Records Management Deployment and Configuration
• Microsoft Office SharePoint Server 2007 Enterprise Features Administration Windows SharePoint Services 3.0
• What's New in Windows SharePoint Services Feature Walkthrough
• Microsoft Windows SharePoint Services Installation and Configuration

MSDN (click here):

• Creating Workflows for Windows SharePoint Services
• Introducing Content Types for Windows SharePoint Services
• Understanding the 2007 Microsoft Office System User Experience and Interface Design
• Programmatic Manipulation of the Microsoft Office Open XML Formats

They are a great way to get hands on experience of SharePoint Server 2007, Windows SharePoint Services v3 and Office Client Apps.