This library is a collection of snippets that's used by goobook (bug #313643). It's available in sunrise-overlay since it's a goobook dependency.
This is available in sunrise-overlay, once reviewed by a developer: http://overlays.gentoo.org/proj/sunrise/browser/reviewed/dev-python/hcs-utils
Created attachment 244393 [details] hcs-utils ebuild
*hcs-utils-1.1.1 (29 Aug 2010) 29 Aug 2010; Markos Chandras <hwoarang@gentoo.org> +hcs-utils-1.1.1.ebuild, +metadata.xml: Moved from sunrise overlay. Bug #334267. Thanks to Fabiano Francesconi (elbryan) <fabiano.francesconi@gmail.com> for the initial ebuild