localhost apg # emerge openoffice-bin -va

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  N    ] app-office/openoffice-bin-2.2.0  USE="gnome java kde" LINGUAS="sv -af -as_IN -be_BY -bg -br -bs -ca -cs -cy -da -de -dz -el -en -en_GB -en_ZA -eo -es -et -fa -fi -fr -ga -gl -gu_IN -he -hi_IN -hr -hu -it -ja -km -ko -ku -lt -mk -ml_IN -mr_IN -nb -ne -nl -nn -nr -ns -or_IN -pa_IN -pl -pt -pt_BR -ru -rw -sh_YU -sk -sl -sr_CS -ss -st -sw_TZ -ta_IN -te_IN -tg -th -ti_ER -tn -tr -ts -uk -ur_IN -ve -vi -xh -zh_CN -zh_TW -zu" 142,062 kB
[blocks B     ] app-office/openoffice (is blocking app-office/openoffice-bin-2.2.0)
[blocks B     ] app-office/openoffice-bin (is blocking app-office/openoffice-2.1.0-r1)

Total: 1 package (1 new, 2 blocks), Size of downloads: 142,062 kB

!!! Error: The above package list contains packages which cannot be installed
!!!        at the same time on the same system.

For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):

http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?full=1#blocked