I was doing a random web search to find the MSDN information on Project.SetProperty(), and came across a super-detailed article on MSBuild. It has sample XML, flow charts, examples of console output, information on item groups, metadata, conditionals, targets and tasks, a list of possible targets to import, our XSD, the object model (which is why it came up in my search), a sample application, a logger, and more!
Of course, it's all in Russian, but still!
Update: Dan and Chris pointed out that you can get a reasonable translation through Babelfish. Now the article is even more interesting!
[ Author: Neil Enns ]