As of sys-power/hibernate-script-2.0, the ebuild lacks applying the needed hibernate-cleanup init script patch to convert it from a shell script to a Gentoo init script.
`emerge --sync' please: *hibernate-script-2.0-r1 (01 May 2009) 01 May 2009; Krzysiek Pawlik <nelchael@gentoo.org> -hibernate-script-2.0.ebuild, +hibernate-script-2.0-r1.ebuild, +files/hibernate-script-2.0-init.d.patch: Fix init.d script, see bug #265368.