In this week’s show IBM and Sun merger talks break down, Acer launches 20 new products, Nintendo’s DSi launches worldwide, the Mousegrips helps you exercise while checking e-mail, Nanotouch solves the fat finger problem, JAXA unveils a new supercomputer, iRobot updates the Looj, Skype helps marriages, GM and Segway unveil the PUMA and Casmobot mows the lawn.