On http://www.oracle.com/technetwork/topics/linuxsoft-082809.html there is new version of instantclient. Not sure for how long.
Created attachment 253973 [details] oracle-instantclient-basic-11.2.0.2.ebuild
Created attachment 253975 [details] oracle-instantclient-sqlplus-11.2.0.2.ebuild
Created attachment 253977 [details] oracle-instantclient-jdbc-11.2.0.2.ebuild
InCVS.