By user13342178 on Sep 11, 2009
IBM asks all their employees to stop using Microsoft Office, and completely switch to Lotus Symphony - IBM's office suite which is based on OpenOffice.org 1.1.
The important thing here is not that all employees should use IBM software, which you would expect anyway (eat your own dog food). The important thing is that the main goal with this is to completely switch to the OpenDocument Format (aka ODF) - the free and open standard for office documents.
I guess this might have some signaling effect for many other companies - ODF is the broadly accepted free and open standard for office documents. Most people wouldn't consider Microsoft's OOXML format as an alternative, and meanwhile almost everyone knows that it's important to migrate away from Microsoft's binary document format - to ease further document processing, to make sure that you will still be able to read you documents in many years, and to avoid further vendor lock-ins.
Right now I could only find German news articles about this, but I am sure English articles will show up later this day.