Microsoft is moving its Developer & IT Professional primary support content (also known as Knowledge Base – or KB - articles) from http://support.microsoft.com Web site to MSDN and TechNet, respectively. This move is to ensure that Developers and IT Professionals will see support information in the places they would most likely to be looking for it – and so that other, relevant or associated information can be more easily exposed alongside it.

For full details, check out Christopher Kilbourn's Port80 Blog