You know, strictly speaking Massachusetts isn't switching from Microsoft to OpenOffice. Massachusetts is switching to the OpenDoc standard. Although OpenOffice developed OpenDoc, anyone can implement it into their word processors, including Corel (Wordperfect) and Microsoft.
However, Microsoft refuses to support OpenDoc, even after Massachusetts made this announcement.
So, in essence, Massachusetts isn't rejecting Microsoft, Microsoft is rejecting Massachusetts, unless Massachusetts plays by MS' rules.