Official SharePoint Blog – this site has real world examples http://sharepoint.microsoft.com/blogs/GetThePoint/

Test drive Office 2007 system
http://office.microsoft.com/en-us/products/HA101687261033.aspx

MSDN SharePoint Blog
http://blogs.msdn.com/sharepoint

E-learning courses available:

• Course 5465: Getting Started with Windows SharePoint Services 3.0
• Course 5466: Creating and Managing Windows SharePoint Services 3.0 Site
• Course 5467: Team Collaboration with Windows SharePoint Services 3.0
• Course 5468: Using Windows SharePoint Services 3.0 with Microsoft 2007 Office System Applications

SharePoint Learning
http://www.microsoft.com/sharepoint/learning