So, thanks, Microsoft!
If you use MS Office, I encourage you to begin using ODF as the standard format in which to store all of your documents as soon as the option is available to you. Then you can continue to use MS Office, or you can select among a range of other tools to suit your evolving needs, and you can share documents with others in other organizations using the standard.
Thanks to the TP! Wire Service for publicizing this. I have yet to find the corresponding announcement on the Microsoft Web site.