Mary Jo Foley has been a persistent thorn in Microsoft's side for more than 10 years. She is one of the top investigative journalists covering Microsoft and knows the company inside and out. She was even blacklisted one time by the giant of Redmond. Mary Jo and I have worked together over the years, at PCWeek (now eWeek) and during a stint at ZDNet News. As an editor, you would like to have a newsroom full Mary Jos seeking out and interpreting the most important stories. I am happy to report that Mary Jo and I will be working together again. This week we revved up her new blog, All about Microsoft, on ZDNet as she joins our merry band of bloggers. Be sure to subscribe to her feed, and give her your feedback.