MOSS 2007 Hands-on Labs:

• Office SharePoint Server 2007 Functional and Architectural Overview Virtual Lab
• Enterprise Content Management with Office SharePoint Server 2007 Virtual Lab
• Organizing and Finding Resources with Office SharePoint Server 2007 Virtual Lab
• Business Solutions Using Office SharePoint Server 2007 Virtual Lab

WSS V3 Hands-on Labs:

• Introduction to Windows SharePoint Services 3.0 Virtual Lab
• Implementing and Administering Windows SharePoint Services 3.0 Virtual Lab

I know a number of people who are trying to install MOSS 2007 Beta II but not been able to do it. Bill English is a SharePoint Guru and he has posted a coolest article on How to install Moss 2007 here