List of all installed and uninstalled files by system updating 2 days back:
$ genlop -l -u --date 2 days ago
* sys-libs/mtdev
Thu Mar 22 23:33:27 2012 >>> sys-libs/mtdev-1.1.2
Thu Mar 22 23:34:35 2012 <<< sys-fs/ntfs3g-2011.4.12
Thu Mar 22 23:34:37 2012 >>> sys-fs/ntfs3g-2011.4.12
Thu Mar 22 23:35:40 2012 <<< dev-db/sqlite-3.7.10
Thu Mar 22 23:35:41 2012 >>> dev-db/sqlite-3.7.11
Thu Mar 22 23:36:03 2012 <<< x11-libs/libpciaccess-0.12.1
Thu Mar 22 23:36:04 2012 >>> x11-libs/libpciaccess-0.13
Thu Mar 22 23:37:36 2012 <<< media-libs/id3lib-3.8.3-r8
Thu Mar 22 23:37:37 2012 >>> media-libs/id3lib-3.8.3-r8
Thu Mar 22 23:37:46 2012 <<< perl-core/Time-Local-1.19.01
Thu Mar 22 23:37:47 2012 >>> perl-core/Time-Local-1.200.0
Thu Mar 22 23:37:53 2012 <<< virtual/perl-Time-Local-1.19.01
Thu Mar 22 23:37:54 2012 >>> virtual/perl-Time-Local-1.200.0-r1
Thu Mar 22 23:38:04 2012 >>> perl-core/Test-Harness-3.230.0
Thu Mar 22 23:38:11 2012 <<< x11-base/xorg-drivers-1.11
Thu Mar 22 23:38:11 2012 >>> x11-base/xorg-drivers-1.12
Thu Mar 22 23:45:04 2012 <<< media-video/ffmpeg-0.10
Thu Mar 22 23:45:06 2012 >>> media-video/ffmpeg-0.10.2
Thu Mar 22 23:48:16 2012 <<< media-video/mplayer-1.0_rc4_p20120213
Thu Mar 22 23:48:17 2012 >>> media-video/mplayer-1.0_rc4_p20120213
Thu Mar 22 23:48:22 2012 <<< media-plugins/gst-plugins-meta-0.10-r6
Thu Mar 22 23:48:23 2012 >>> media-plugins/gst-plugins-meta-0.10-r6
Thu Mar 22 23:48:50 2012 >>> sys-apps/kmod-7
Thu Mar 22 23:48:53 2012 <<< sys-apps/module-init-tools-3.16-r1
Thu Mar 22 23:48:59 2012 >>> sys-fs/udev-init-scripts-10