Open XML Format (Microsoft Office Open XML Format)

I've just seen a very interesting webcast about Open Xml Format for Office 2007 and demos were awesome, and I belive that this new Architecture effort will bring a lot of new oportunities for devs, final users, but also for organizations that align to use this type of technologies, one of the most outstanding benefits is that along with xml sections structures, all office suite includes a ZIP based funtionality that allows to reduce the size of OPEN XML documents a lot more than you can do normally with binary files compressed by any engine.

Lets wait until this is released, but in the meantime you can know more about this topic here ... don't forget to visit source forge Open XML Translator project website