i remember before the SR 1 was released, Browne from MacBU said that they were already working on the new version. I think cnet had the article and they also had a very small preview of it. if i find it, i'll post the link
i can't find the link for anything... It wasn't anything special... it was from April when the Apple/MS agreement was coming to a close...Kevin Browne of MacBU said that the next version of Office was already in development and he stated that MS would continue to conduct business with Apple as long as it was profitable