This enhancement request (dated 8 June 2007) is just for the file viewers, but it's a start I guess, and as it seems to be a FAQ I suppose one can safely assume it's frequently asked?
Only a fool will believe that IBM have no plans to shift gear immediately to OpenXML if the market shows everyone is going to OpenXML. I am willing to bet you good money that IBM's internal software implementation will allow plugin of additional formats. They probably have one OpenXML plugin working internally already.
OpenXML File viewer? Why support one-way only, i.e., Read?
Here are a few interesting links I came across this week: Open XML in Science and Nature - Murray Sargent
Jason Matusow and I were sat next to each other at a meeting at the end of last week. I was laughing