We learn from FS2Crew that they are working on a totally new project of interest for PMDG 737 NGX pilots called  “Audio” ground school for the 737NG series. While this ground school is primarily aimed at real-world 737NG pilots preparing for initial or recurrent training, PMDG 737 NGX simmers who want to acquired advanced 737NG systems knowledge at the professional level will also be able to use and benefit from this new concept. The audio training is recorded by a real-world 737NG Captain who brings a wealth of personal experience to the product. The product is expected to be available in mid October 2011. You can purchase FS2Crew product on simMarket from here.