From Tim Bray, we learn that Open Document 1.0 has been approved as an OASIS Standard. The new format will be the standard for the OpenOffice.org office suite. This paves the way for an unprecedented level of compatibility between applications and tools dealing with a wide variety of document types.
In the interest of fairness, I’ll point out that Microsoft did document the new XML formats for Microsoft Office 11, which opens up the same sorts of capabilities. Mostly.