If you believe that Open XML file formats should be an ISO standard and are the future in helping integrating front and back end processes, please sign this petition.

There's plenty of information on the site to help you make your mind up and plenty of strong views on the web for some light background reading.

I like this bit in Nick's letter, highlighting Ecma's heritage:

Microsoft and others called for the standardisation of Open XML. On 7 Dec 2006 Ecma International, a highly respected standardisation body, approved the adoption of Open XML as an international open standard. 

The strengths of Ecma Open XML are clear:

• Ecma Open XML was developed through the collaborative efforts of leading companies such as Apple, Barclays Capital, BP, The British Library, Essilor, Intel, Microsoft, NextPage, Novell, Statoil, Toshiba and the US Library of Congress.

• Ecma Open XML is backward compatible with billions of archived documents held by the private and public sectors.

• Any company can freely implement and develop innovative products using Ecma Open XML

• Ecma Open XML enables interoperability, accommodates multiple languages and cultures, and supports technologies that enable people with disabilities to use computing devices.