Here's  a good article that explains how to install the necessary prerequisites for all Microsoft Exchange Server 2007 Service Pack 1 (SP1) server roles on Windows Server 2008 or Windows Vista. http://technet.microsoft.com/en-us/library/bb691354.aspx

I know that this post is a little bit out of the blog topic but I think that this news are important to all people, so it's been announced that the 28th of February it will be launched the new Windows Server 2008, as well as SQL 2008 and Visual studio 2008, here's some useful links for each technology...