Mike Champion on XML 2006
Just a link post, but worth reading if you're interested in Linq to XMLMike Champion is one of the PMs on the LINQ to XML team in Microsoft.
He wrote the report referenced below on XML 2006 (he was the track chair for the XML computing sessions). The most interesting portion of his review is the compare and contrast of Linq to XML and XJ.
Local note: Mike Champion was a long-time member of the Ann Arbor Software community. I've had the pleasure of working with him on a number of projects in the past.
XML 2006 ObservationsFrom Mike Champion