CADDtutorialsOnline.com is Geoff Langdon's new Web site that hosts dozens of short video tips for AutoCAD, DataCAD, and ArchiCAD -- so far. Others to be added include ZipCAD, SketchUp, Revit, VectorWorks, and Architectural Desktop.
One five-minute tutorial that shows how to take a design file from SketchUp to Architectural Desktop, and then render it with Radience and PhotoShop.
Tutorials are priced between US$3 and $20, depending on their lengths. There are also links to tutorials created by CAD vendors: ZipCAD and SketchUp.