Steven Sinofsky, who lead the development of Microsoft's Windows division until November 2012, has now launched a new blog called Learning by Shipping From Neowin:

Since departing Microsoft as head of its Windows division in November, Steven Sinofsky has made most of his public comments via his Twitter account. Today, Sinofsky launched what he calls an experiment; a new blog called Learning by Shipping

Sinofsky's first blog post says that Learning by Shipping is supposed to be a continuation of sort of the kinds of blog posts he wrote while he worked at Microsoft, including the Building Windows 8 blog, which allowed himself and other members of the Windows 8 team to make announcements and go into detail about the new features of the OS.

Former Windows leader Steven Sinofsky launches new blog