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The FreeBSD/ia64 project pages contain information about the FreeBSD port to Intel's IA-64 architecture; officially known as the Intel Itanium® Processor Family (IPF). As with the port itself, these pages are still mostly a work in progress.
The ia64 port is still considered a tier 2 platform.
This boils down to not being fully supported by our
security officer, release engineers and toolchain
maintainers. In practice however the distinction
between a tier 1 platform (which is fully supported)
and a tier 2 platform is not as strict as it seems. In
almost all aspects the ia64 port is a tier 1
platform.
From a developer point of view there's an advantage to
have the ia64 port be a tier 2 platform for a while
longer. We still have a couple of ABI breaking changes
in the pipeline and having to maintain backward
compatibility this early in a ports life is less than
ideal.