I just read an interesting piece on Internet News about blogging, in the context of Microsoft, Longhorn and the PDC. I definitely think blogs have had a pretty substantial impact on the flow of information about new and existing Microsoft products. Within Microsoft, a great source of technical information is the archives of various internal mailing lists. Increasingly, I notice that a lot of that information and more is being shared broadly through blogs. Ofcourse, Google Groups helps too!

The issue with newsgroups is that you find answers to a lot of questions, but no real in depth articles and explanation. MSDN articles, on the other hand, have a lot of great information, but no real feedback/update mechanism. Blogs seem to incorporate the best of both worlds, with the added advantage of informality and a personal touch.