New article from MSDN, SharePoint 2010 Architecture Overview, covers high level overview of SharePoint 2010 architectures. It covers SharePoint Development stack, the server and client object models, sandboxed & farm solutions, workflows and more ...
Check it out at: http://msdn.microsoft.com/en-us/library/gg552610.aspx
This article also enables you to do further researches on each discussed topic.
