The Project 2010 SDK is updated for MSDN online. See Project 2010 SDK Documentation. New topics include the following:
There are also many new and updated descriptions in the Project Server API reference. Plus, the following PSI methods have new code samples, all based on WCF:
Note: The update is online only. The Project 2010 SDK Download is still the September 2010 release; the download will be updated within two months, to include the new code samples. For now, you can get the ProjTool sample here.