Roy gave us a useful link to a brief discussion by Software Freedom Law Center's Mark Webbink from his office.
It's a short overview of the history of software patents and very good background.
"Achieving Openness: a closer look at ODF & OOXML" | (Jun 2007)
"Interoperability: will the real universal file format please stand up?" | Novatica UPGRADE (Dec 2006)
"What is OpenDocument?" | O'Reilly ONLamp (Jul 2006)
"ODF & Innovation Theory" | PlexNex (Oct 2006)
Articles are archived at Hiser Verlag.