Re:Microsoft Office Open XML Formats (Score 0)

From the First link

Compatibility. By installing a simple update, users of Office 2000, Office XP, and Office 2003 Editions can open, edit, and save documents in one of the Office XML Formats.

So they would not even need to upgrade, but simply update. I don't see this being a big deal, really. Even the betanews article (From June, I would point out) mentions the state's open standard requirements and how the MS approach would address it.