Two quick (apparent) FAQ bugs:
http://www.openbsd.org/faq/faq14.html#Boot386 - The second example MBR
announcement message in 14.6 ("Using Drive 0, Partition 3;")
capitalizes Drive and Partition when I believe they should be lower
case. (I at least don't see any way in mbr.S that the D and P could
end up capitalized.)
http://www.openbsd.org/faq/faq14.html#foreignfs - First paragraph of
14.16 says "Note that FreeBSD's UFS2 filesystem is not supported." Is
this still true? 14.7 suggests that UFS2 is the same as FFS2, which
it also says is supported since 4.3.