Microsoft has made an alternative web site available at https://information.microsoft.com. in case people experience difficulty accessing www.microsoft.com.
Although our measurement points have seen some requests to www.microsoft.com fail today - to put this in context, www.inetu.net, the top ranked hosting company site hasn’t had a request fail in over two months - it’s been pretty much business as usual for the web site to date, with most response times little different from any other day.
Windows computers infected with MyDoom.B are programmed to begin attacking www.microsoft.com today at 13:09:18 (UTC) and continue through March 1st.
Performance data for the sites involved in the MyDoom DDoS is available here.