emerge -av --update --newuse --deep world

These are the packages that I would merge, in order:

Calculating world dependencies ...done!
[ebuild   R   ] dev-java/blackdown-jre-1.4.2.03-r2  USE="X alsa -browserplugin -mozilla* -nsplugin" 13,224 kB
[ebuild   R   ] dev-java/blackdown-jdk-1.4.2.03-r2  USE="X alsa -browserplugin -doc -mozilla* -nsplugin" 33,570 kB
[ebuild   R   ] gnome-extra/yelp-2.12.2  USE="firefox* -debug" 796 kB
[ebuild   R   ] www-client/epiphany-1.8.3  USE="firefox* python -dbus -debug -doc" 3,276 kB
[ebuild   R   ] media-sound/xmms-1.2.10-r15  USE="alsa arts esd mad mikmod mp3 nls oss vorbis -3dnow -directfb -flac -jack -lirc -mmx* -sndfile" 3,006 kB
[ebuild   R   ] media-plugins/xmms-mpg123-1.2.10-r1  USE="ipv6 ssl -3dnow -mmx*" 528 kB
[ebuild     U ] sys-kernel/genkernel-3.3.11_pre4 [3.3.10] USE="-bootsplash -ibm" 7,239 kB
[ebuild   R   ] media-sound/bmpx-0.12.9-r2  USE="a52 irssi mad ogg perl python vorbis xchat xine -dbus* -debug -flac -theora*" 1,581 kB

Total size of downloads: 63,222 kB

Do you want me to merge these packages? [Yes/No]