Mike Rhodin leaves behind <A HREF="http://www.eweek.com/c/a/Messaging-and-Collaboration/IBM-Lotus-Soars-Under-Departing-GM/">a strong legacy for IBM's collaboration software unit,</A> which posted 17 percent year-over-year sales growth in the first quarter. An IBM spokesperson told eWEEK the Armonk, N.Y., company made the change April 1, handing over the Lotus reigns to Bob Picciano, previously vice president of worldwide information management sales for IBM.