emelfm2 has support for udisks using WITH_DEVKIT=1 as `make` argument, but the package is not in portage at this time :/
*emelfm2-0.7.2-r1 (08 Apr 2010) 08 Apr 2010; Samuli Suominen <ssuominen@gentoo.org> +emelfm2-0.7.2-r1.ebuild: Introduce org.freedesktop.UDisks support wrt #313579.