I did a presentation called "Profiling and Tuning LINQ Queries" for the Richmond Sharepoint User Group on May 8th. I had gotten so busy, I forgot to post the slides and sample code. Here it is.

Profiling and Tuning LINQ Queries.pptx (75.58 kb) - these are the PowerPoint 2007 slides

ProfileLINQ20080508.zip (27.96 kb) - this C# project builds a dynamic query against the Northwind database using LINQ to SQL, allowing the use of the SQL Profiler to be used to see the increasing complexity of the queries as criteria is added and data is shaped using increasingly complex anonymous types.