@Code Listing 8 "uname -m" should print just the arch "i686" not all information as it says.
http://bugs.gentoo.org/enter_bug.cgi: Doc Other: Documentation which does not deal with www.gentoo.org/doc or translations. Doc Translations: All documents not in English on www.gentoo.org Documentation: Guides and handbooks located under www.gentoo.org/doc
I'm tempted to take that HOWTO down completely and mark app-emulation/x86-chroot stable which does all the work for you. However, it needs some more testing beforehand...
fixed, thanks to Thomas Skyt