SharePoint 2010 Technical Diagrams

http://technet.microsoft.com/en-us/library/cc263199.aspx

Many of these resources are visual representations of recommended solutions. They include poster-sized documents available in formats including Microsoft Office Visio 2007 or Microsoft Visio 2010 files (.vsd), PDF files, and XPS files.

http://www.sharepointinnovations.com/