I think we might have had an Itanium box at Unitech, but then we had something like 15-20 various HP, Sun and other commercial Unix systems running different OS versions for building and QA. Though the IBM PowerPC was the last major box we added. Generally we all developed on Windows and would telnet into whatever arch/OS combo we needed. I do remember we had “the Vista box” and a couple other Windows workstations that were shared on an as-needed basis, and if we did have an Itanium, it would have been one of those.
Virtualization makes things so much easier!