Personally, I think it was a mistake for Microsoft not to provide some menu migration ability where perhaps the old menuing system could be turned back on for say 60 days to ease the transition. For whatever reason that never happened, so when you started Office 2007 you had no other option but to use the ribbon menu.
For those who still want the old Office 2003 style menuing here’s a potential solution.
As you can see from the above picture UBit menu software has a free plug in that allows you to retro fit Office 2003 menus into Office 2007. You sorta have to wonder why Microsoft really didn’t do this? I suppose that’s the benefit of being the dominate provider of desktop software, ‘everyone will change and change on this version’. I really don’t think that helps sell more software given how many people have used office for all those years.