Always good to see people trying to fight superstition. :) Just one tiny nitpick if you don't mind: it seems to me it's somewhat unclear what does FreeBSD actually do. In FreeBSD there is in fact no /dev/urandom, it's just a symlink to /dev/random. If one already doesn't know this, relevant parts of the last section can be a bit confusing, IMO, so maybe you should point out that they are the same device (or that urandom doesn't really exist, or something like that).
