In a keynote during his company's Worldwide Partner Conference, Microsoft chief executive Steve Ballmer said the software giant believes there is currently a great opportunity to <A HREF="http://www.integratedmar.com/ecl-usa/story.cfm?item=18483">lure Lotus Notes users away</A> from IBM's software, saying that he and Notes customers "don't know what the heck IBM is doing" and that IBM has offered mixed messages about the future of the messaging client.