FreeBSD 10.1-RELEASE is now available for the amd64, i386, ia64, powerpc, powerpc64, sparc64, and armv6 architectures.
So that is production ready for PC, Itanium, IBM Power (i Series), Oracle and ARM systems. That's pretty much anything that you would want for enterprise use. Some obvious things like MIPS are missing, but that's very minor and older releases should be available and NetBSD will cover that as well. For production usage, FreeBSD is fully ready to go.