http://www.gartner.com/DisplayDocument?doc_cd=126784
Interesting points is that it may spell the demise of DataStage TX and it may impact on the Ascential release schedule.
Ascential customers: Seek assurances that IBM remains committed to Ascential's defined product road map and timing of forthcoming major releases. Mercator/DataStage TX customers should anticipate some pressure over time to migrate to WebSphere Business Integrator, and should analyze gaps and overlaps in light of IBM's product plans to determine if and when migration would be appropriate.