Great question — answering as the UphillTech team:
At the end of http://forums.freebsd.org/showthread.php?t=13261 , a FreeBSD developer mentions that AFAIR it was told somewhere that for 64bit archs it should be possible to rise [the number of logical cores] up to 64 without much troubles, except increased memory consumption. It just wasn't tested due to lack of such systems. Further increase will probably require some architectural changes. That comment was made in April 2010. Earlier posts in the thread quote an include file which specifies the number of cores. It might help to remember that Google will let you filter out things using syntax like -"64-bit" — though in this case, and perhaps others, the quoted result would have been...
Full answer by intuited: https://superuser.stackexchange.com/a/233361 (CC BY-SA 4.0).
Need it done for your business? UphillTech.
