Here is the first comprehensive breakdown of versions I was able to find--pricing in the U.S. is still up in the air--proposed UK prices have been released through material that was sent to Amazon. But knowing MS and particularly now, I would consider pricing in a state of flux. There have been so many licensing changes, and volume subscription changes being continually tweaked in the past year, that you really need a complicated program to know the score. Here's the version breakdown that will probablyhappen. Office 2003 did ship to OEM's yesterday morning--I'm sure you'll see if not already material on the big 5 OEM sites:

Microsoft Office 2003 Editions Compared