steven sinofsky and jon devaan have begun an engineering windows 7 blog.  three posts have already been placed on the e7 blog.  steven had a msdn blog called techtalk, but ceased this public blog about 2 1/2 years ago to focus on an internal blog.  in steven and jon's first post, they confirmed that pdc (professional developers conference) and winhec (windows hardware engineering conference) will be the first venues for with in-depth technical information about windows 7.  it's going to be an interesting fall!