I'm a blog booster (shocking, huh?) and I am all for open communications between gigantic faceless corporations and users. Microsoft has taken the lead with having its employees staff official, Microsoft hosted, blogs. It looks like the Mac Business Unit (the Mac BU) of Microsoft has thrown its hat into the blogging ring.
Remember that Microsoft is the second largest Mac developer in the world (who is number one? Apple), so before you bash 'em in the comments remember that lots of people use Office very happily on their Macs.