amd ~amd64 to gkismet tested and works great.
Sorry, just read the new instructions now :)
Works fine ta, please mark ~amd64 Jim Portage 2.0.51.22-r3 (default-linux/amd64/2005.1, gcc-3.4.4, glibc-2.3.5-r2, 2.6.13-gentoo-r3 x86_64) ================================================================= System uname: 2.6.13-gentoo-r3 x86_64 AMD Athlon(tm) 64 Processor 3200+ Gentoo Base System version 1.6.13 dev-lang/python: 2.3.5-r2, 2.4.2 sys-apps/sandbox: 1.2.12 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.15.92.0.2-r10 sys-devel/libtool: 1.5.20 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="amd64" AUTOCLEAN="yes" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -march=athlon64 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/splash /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -march=athlon64 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks multilib-strict sandbox sfperms strict" GENTOO_MIRRORS="http://gentoo.blueyonder.co.uk" LINGUAS="en_GB" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X aac alsa amarok amd64 apache2 avi berkdb bitmap-fonts browserplugin cdb cdr crypt cups curl directfb dvd dvdr dvdread eds emboss encode fam flac foomaticdb fortran freetype gd gdbm gif gphoto2 gpm gstreamer gtk gtk2 guile hal imagemagick imlib ipv6 java javascript jpeg junit kde kdeenablefinal ldap libwww lzw lzw-tiff mad mikmod mp3 mpeg mplayer msn mysql ncurses nls nocd nvidia ogg oggvorbis opengl oss pam pdflib perl php png ppds python qt quicktime readline real samba sdl spell ssl symlink tcpd tetex theora tiff truetype truetype-fonts type1-fonts usb userlocales v4l vcd vorbis xine xml xml2 xpm xv zlib linguas_en_GB userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS
~amd64 keyword added Thanks both for the testing