Bugzilla Bug 136864

media-libs/exiftool-6.17 installs and works on PPC.

Portage 2.1 (default-linux/ppc/ppc32/2006.0, gcc-4.1.1/vanilla, glibc-2.4-r3,
2.6.16-gentoo-r9 ppc)
=================================================================
System uname: 2.6.16-gentoo-r9 ppc 7447A, altivec supported
Gentoo Base System version 1.12.1
ccache version 2.4 [enabled]
dev-lang/python:     2.4.3-r1
dev-python/pycrypto: 2.0.1-r5
dev-util/ccache:     2.4-r2
dev-util/confcache:  0.4.2-r1
sys-apps/sandbox:    1.2.18.1
sys-devel/autoconf:  2.13, 2.59-r7
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2
sys-devel/binutils:  2.16.1-r2
sys-devel/gcc-config: 2.0.0_rc1
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.11-r4
ACCEPT_KEYWORDS="ppc ~ppc"
AUTOCLEAN="yes"
CBUILD="powerpc-unknown-linux-gnu"
CFLAGS="-O2 -pipe -mtune=G4 -mcpu=G4 -maltivec -mabi=altivec
-fno-strict-aliasing -fomit-frame-pointer"
CHOST="powerpc-unknown-linux-gnu"
CONFIG_PROTECT="/etc /etc/env.d /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/eselect/compiler /etc/gconf /etc/init.d
/etc/revdep-rebuild /etc/terminfo /etc/texmf/web2c"
CXXFLAGS="-O2 -pipe -mtune=G4 -mcpu=G4 -maltivec -mabi=altivec
-fno-strict-aliasing -fomit-frame-pointer"
DISTDIR="/mnt/portage/distfiles"
EMERGE_DEFAULT_OPTS="--alphabetical"
FEATURES="autoconfig buildpkg ccache distlocks metadata-transfer sandbox
sfperms strict"
GENTOO_MIRRORS="ftp://gentoo.digimed.co.uk/
http://pandemonium.tiscali.de/pub/gentoo/ http://mir.zyrianes.net/gentoo/
ftp://mir.zyrianes.net/gentoo/"
LANG="en_GB"
LC_ALL="en_GB"
LINGUAS="en_GB"
MAKEOPTS="-j2"
PKGDIR="/mnt/portage/packages/krikkit"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude='/distfiles' --exclude='/local' --exclude='/packages'"
PORTAGE_TMPDIR="/mnt/scratch"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/mnt/portage/local"
SYNC="rsync://desiato/gentoo"
USE="ppc X alsa altivec apm artswrappersuid audiofile berkdb bitmap-fonts
bluetooth bzip2 cddb cdr cli crypt cups curl dbus dri dv dvd emboss encode exif
ffmpeg flac foomaticdb gdbm gif gimpprint gphoto2 gpm gtk gtk2 hal ieee1394
imagemagick imlib isdnlog java jpeg jpeg2k kde kdeenablefinal
kdehiddenvisibility libg++ libwww mad mng mono motif mp3 mpeg musicbrainz mysql
ncurses nptl nptlonly offensive ogg oggvorbis opengl pcre pdflib perl png ppds
pppd python qt quicktime readline reflection scanner sdl session slp speex
spell spl ssl svg tcltk tcpd theora tiff truetype truetype-fonts type1-fonts
udev unicode usb userlocales vhosts vorbis wifi xml xml2 xorg xv xvid zlib
elibc_glibc input_devices_keyboard input_devices_mouse kernel_linux
linguas_en_GB userland_GNU video_cards_ati video_cards_vesa"
Unset:  CTARGET, INSTALL_MASK, LDFLAGS, PORTAGE_RSYNC_EXTRA_OPTS

Added to ~ppc, thanks for reporting!