A new version of my CodeProject article "Reattaching Entity Graphs with the Entity Framework" has been posted. The main purpose of the update was enhancing performance, an issue brought to my attention by my colleague Luc. A description of this change can be found in the article under the chapter "Performance".
Feel free to comment on the article or code on CodeProject, and don't forget to vote for the article ;)
CodeProject - Reattaching Entity Graphs with the Entity Framework
http://www.codeproject.com/KB/architecture/attachobjectgraph.aspx