Sun's CEO Scott McNealy has published an open letter to HP, proposing a merger of their respective UNIX platforms. In the past, Sun's top execs have been highly critical of HP-UX's future. Sun's president Jonathan Schwartz has repeatedly referred to the 'demise' and its troubled commitment to Intel's Itanium chip. Now, it seems, they've hit on a new idea. "We propose an alternative," writes McNealy in the letter, "that Sun and HP commit to converge HP-UX with Sun's flagship volume UNIX, Solaris 10.'