The latest version of this mini-HOWTO can be downloaded from this site in several formats (including SGML and PostScript.) The document has been translated into Japanese by Mr. Teruyoshi Fujiwara as part of the JF project.
You can find some articles about the difference between Linux and FreeBSD here.
You can find more informations about FreeBSD (and download the whole system) at this site. You can also buy the system on CDROMs from Walnut Creek CDROM (their servers are running FreeBSD.)
The Linux Kernel HOWTO (and this mini-HOWTO) is released as part of The Linux Documentation Project.