Thanks, all. I finished the upgrade not too long ago and checked out iTunes (9) functionality. No problem. Windows 7 upgrade installed with iTunes in place. The only "problem" was that during the install, when compatability was being checked, it was recommended that iTunes be uninstalled. Pay no attention to it as there were no problems.
I would now venture to say that if one has any 9 version of iT, sucdh an installation will not cause headaches.