We have been upgraded to 2007 Excel, Word etc. at work - without consultation by the IT team - the only visible net result is that 2007 documents sent to consultants, government departments and other partner organisations cannot be opened at their end. These do have a facility to allow saving as 1997-2003 files so they can be universally accessed, but what is the point of upgrading if you have to downgrade your files so you can share them?