I have previously mentioned some free training that is available for SharePoint here: http://blogs.technet.com/seanearp/archive/2007/12/07/sharepoint-training.aspx
The one thing that was lacking, however, was training for SharePoint Designer, which is really needed to make SharePoint sing. The combination of SharePoint, Designer, and Visual Studio will allow you to do just about anything but wash dishes. SharePoint is really the server equivalent of Excel (it does everything!). Unfortunately, to date there has been not as much training available on SharePoint Designer as I would like to have seen. Fortunately, that changes today! (and as always... it's free)
From the overview:
The Microsoft Office SharePoint Designer 2007 Training (Standalone Edition) leads the learner step-by-step through SharePoint Designer features using easy to understand videos. Built with the SharePoint platform integration in mind and engineered to work efficiently with Microsoft Windows SharePoint Services and Microsoft Office SharePoint Server 2007, SharePoint Designer will help you customize your SharePoint sites to make it an even more powerful tool for productivity. SharePoint Designer is the ideal tool for Information Workers to build composite applications, design and customize workflows and tailor SharePoint sites to their branding needs.
If you are a server administrator and want to install the Portal Edition to your Office SharePoint Server site, click here. The Portal Edition allows you to add or remove content to help your users learn about Office SharePoint Designer.