Da última compilação de kernel:


Copyright (c) 1992-2007 The FreeBSD Project. 
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 
The Regents of the University of California. All rights reserved. 
FreeBSD is a registered trademark of The FreeBSD Foundation. 
FreeBSD 6.3-PRERELEASE #1: Sat Nov 10 13:01:13 CST 2007 root@musashi:/usr/src/sys/i386/compile/GENERIC 
WARNING: MPSAFE network stack disabled, expect reduced performance. 
ACPI APIC Table:  Timecounter "i8254" frequency 1193182 Hz quality 
0 CPU: Intel(R) Pentium(R) M processor 1.73GHz (1729.18-MHz 686-class CPU) 
Origin = "GenuineIntel" Id = 0x6d8 Stepping = 8 
[...]

  A tag 6.3-PRERELEASE já diz tudo. Se bem que eu provavelmente vá pular direto pro release 7.0... mais emocionante.