My Funtoo /etc/portage/package.use config

app-admin/gkrellm hddtemp
app-i18n/ibus dconf	# for Gnome 3.6.x (2013-06-21)
app-misc/gentoo -nls -fam
app-misc/tracker -applet
app-portage/eix -deprecated
app-portage/layman -bazaar -cvs git -mercurial -subversion
app-text/lcdf-typetools kpathsea	# for texlive
dev-embedded/libftdi -tools
dev-embedded/openocd ftdi segger usb versaloon
dev-java/sun-jdk nsplugin
dev-lang/python sqlite
dev-libs/folks eds # +eds for folks required by gnome-contacts via Gnome 3.4 upgrade
dev-libs/libxml2 icu # chromium (via deps?) needs +icu
dev-util/cmake -qt4
dev-vcs/git gtk tk
gnome-base/gdm -fallback
gnome-base/gnome -fallback
gnome-base/gnome-vfs -gnutls
gnome-base/gvfs cdda gdu -udisks
mail-client/mail-notification gmail imap pop ssl
media-gfx/blender -ffmpeg	# compilation fails with ffmpeg support enabled, probably because of ffmpeg -> libav change (??)
media-libs/freetype -infinality kpathsea -lcdfilter	# kpathsea for texlive; -lcdfilter for cairo (2012-09-03); -infinality for Gnome 3.4 upgrade clean-up; infinality and lcdfilter enabled 2012-10-27 for better fonts; screw that, disabled again 2012-10-30
media-libs/fontconfig cleartype -lcdfilter # -lcdfilter for these required by world update via some deps (2012-07-23); cleartype added 2012-09-03 via cairo dep; lcdfilter enabled 2012-10-27; disabled 2012-10-30
media-libs/libpng apng	# unofficial animated PNG support for ff 4.0.1
media-libs/libtheora encode
#media-libs/mesa g3dvl llvm vdpau video_cards_intel
#media-libs/mesa -gallium -g3dvl -llvm -xorg -xvmc -xa gbm -gles1 -gles2 video_cards_i965	# ivy
media-libs/mesa -classic -xorg -xvmc -xa   gallium g3dvl gbm gles1 gles2 llvm video_cards_r600
#media-libs/x264 -10bit
media-plugins/alsa-plugins pulseaudio
media-plugins/audacious-plugins -ffmpeg
media-sound/audacity id3tag vamp
media-sound/rhythmbox -cdr -gnome-keyring -lastfm
media-sound/sox amr encode id3tag
media-video/avidemux -amr -qt4
# avx for Core i5/i7:
media-video/ffmpeg aacplus amr celt gsm faac network opus vaapi vdpau vpx
#media-video/libav amr celt gsm faac vpx
media-video/mkvtoolnix -qt4 -wxwidgets
media-video/mplayer amr openal pvr vaapi vdpau
media-video/projectx java6
#media-video/x264-encoder -10bit
net-analyzer/vnstat gd
net-dns/dnsmasq -nls
net-im/empathy -geocode # Gnome 3.4 upgrade related clean-ups
net-im/pidgin -gstreamer gnutls
net-im/skype qt-static
net-libs/gtk-vnc gtk3
net-libs/xulrunner java -networkmanager
net-misc/openssh -ldap
net-nds/openldap sasl # required on world update: cxx? ( sasl )
sci-visualization/gnuplot -pdf plotutils
sys-apps/hal -crypt
sys-apps/gnome-disk-utility fat
sys-block/parted device-mapper
sys-devel/gcc -gtk
sys-devel/gettext cvs git # avoid recompile by world updgrade (2012-09-03)
sys-fs/udev extras
sys-libs/zlib minizip	# required by chromium upgrade (2012-11-15)
virtual/udev gudev hwdb # required by gst-plugins-v4l2 -> ... -> pitivi (2012-12-05)
x11-base/xorg-server -hal
x11-drivers/xf86-video-intel sna uxa
x11-libs/cairo cleartype -directfb -lcdfilter
#x11-libs/libdrm libkms video_cards_intel	# ivy
x11-libs/libdrm libkms video_cards_radeon

dev-db/sqlite fts3 secure-delete	# required by firefox-3.6
www-client/firefox java -networkmanager

cross-msp430-unknown-elf-gnu/binutils -selinux
cross-msp430/msp430-gdb dev-embedded msp430-gdb
cross-msp430/insight dev-util insight
cross-msp430/msp430-binutils -selinux -multilib
cross-msp430/msp430mcu -selinux -multilib
cross-msp430/msp430-libc -selinux -multilib
cross-msp430/msp430-gcc -fortran -openmp -selinux -boundschecking -d -gtk -gcj -libffi -mudflap -objc -objc++ -objc-gc -multilib

cross-avr/avr-libc -selinux multilib
cross-avr/binutils -selinux multilib
cross-avr/gcc -fortran -selinux -boundschecking -d -gtk -gcj -libffi -mudflap -objc -objc++ -objc-gc multilib
cross-avr/gdb sys-devel gdb
cross-avr/insight dev-util insight