I was looking for info on the future of Windows XP as an option to purchase licenses on behalf of a customer, and saw the web page here: http://www.microsoft.com/uk/windows/windows-xp/future.aspx

It is still touting Windows Vista as the future here and now.  Specifically:

The future is here and it's better that ever. Windows Vista is Microsoft's latest operating system with proven benefits over past versions of Windows.

I know Windows 7 has only been out about three months, but this underscores how difficult it is to maintain a website, especially for an international company like Microsoft with a lot of products.  Ultimately this has to rest with the product managers and marketing personnel to make sure the information is kept up to date.  But IT has to provide tools to manage content that also helps to find outdated information.