I have been following this story since it started through the Redmond giant pulling the tool in question and eventually admitting their mistake. Now they’ve made good according to Emil Protalinski at Ars. He has the full details, including an analysis of the GPL v2 compliant release and the original version of the tool first suspect of running afoul of the copyleft provisions of the license.
Bradley Kuhn also has a thoughtful post on his personal blog linking to the work of Rafael Rivera who first identified the violation and was ultimately responsible for getting Microsoft to come into compliance. Bradley’s additional thoughts continue to flesh out his very considered and contemplative view of the entire process and goal of license compliance.