Since f-spot-0.1.3 is in portage (actually even before) I have been successfully running it on my ppc ibook.
f-spot-0.1.5 works perfectly on ppc too.
Forgot to post... # emerge --info Portage 2.0.53 (default-linux/ppc/2005.1/ppc/G4, gcc-4.0.2, glibc-2.3.6-r2, 2.6.15 ppc) ================================================================= System uname: 2.6.15 ppc 7447A, altivec supported Gentoo Base System version 1.6.13 dev-lang/python: 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: 2.16.1 sys-devel/libtool: 1.5.20 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="ppc" AUTOCLEAN="yes" CBUILD="powerpc-unknown-linux-gnu" CFLAGS="-O2 -mcpu=G4 -mtune=G4 -maltivec -mabi=altivec -pipe -fomit-frame-pointer" CHOST="powerpc-unknown-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/share/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -mcpu=G4 -mtune=G4 -maltivec -mabi=altivec -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" LANG="en_US.UTF-8" LC_ALL="en_US.UTF-8" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage /usr/local/gentopia" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="ppc X a52 aac acl alsa altivec audiofile avahi berkdb bitmap-fonts bluetooth bzip2 cairo cdr crypt cups dbus dga dri dvd dvdr eds emboss evo exif expat fam fbcon firefox flac fortran gdbm gif glitz glut gmp gnome gphoto2 gpm gstreamer gtk gtk2 hal howl idn ieee1394 ipv6 jpeg lcms libwww logrotate mad matroska mng mono mp3 mpeg nautilus ncurses nfs nls nptl nptlonly nsplugin ogg oggvorbis opengl pam pci pdflib perl pic pie png pnp posix ppds python readline samba scanner sdl spell sqlite ssl svg symlink tcpd theora tiff truetype truetype-fonts type1-fonts udev unicode usb vorbis xml2 xv zlib video_cards_radeon userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LDFLAGS, LINGUAS
f-spot-0.1.5 already mark as ~ppc.
no, f-spot-0.1.5 is not yet marked ~ppc :)
Oops, forgot to commit the keyword change. Consider this (finally) added to ~ppc ;)