Microsoft changing their filenames!?!

It appears that when Office 2007 is released all file formats as we know them will change. .doc, .xls, .ppt, etc will all be changed from 3 to 4 letter extensions. You can find the list of Office 2007 file formats on Aviran's Place. Biggest reprocussions I see of this change are: 1. Other 3rd party Office Applications will have to conform to Microsoft's new standard (since they are the leader in the Office market). 2. Anyone using older versions of Microsoft Office or the standalone products will be forced by Microsoft to upgrade since the formats will not be backwards compatible.