The last statement I have readen, is that the project did not plan to port it to other platforms.
From my experiance, it is not hard and very time intensive to port it. I did not understand, why rosetta not port to the other platforms. The projects with the other platforms has a good throuhput with the different unix systems.
Mostly the unixes have fast CPUs and a lot of multi CPU systems, so the number of systems is not so high, but the throughput is great...

But, which IA64 OS do you have running ? - SETI and SIMAP has both binaries for IA64 on HPUX and Linux available.