Looks fixed here - just tried it out :)
Module loaded all by itself after reboot :)
[2.2-ALPHA][admin@pfSense]/root(1): kldstat
Id Refs Address Size Name
1 3 0xffffffff80200000 20245a0 kernel
2 1 0xffffffff82412000 1043 amdtemp.ko
[2.2-ALPHA][admin@pfSense]/root(2):
[2.2-ALPHA][admin@pfSense]/root(2): uname -a
FreeBSD pfSense 10.0-STABLE FreeBSD 10.0-STABLE #16 e852cd6(HEAD)-dirty: Thu May 1 22:16:16 CDT 2014 root@builder-10.0-b3-amd64:/usr/obj.amd64/usr/pfSensesrc/src/sys/pfSense_SMP.10 amd64