It's same as gnome-volume-manager but for Thunar filemanager instead of Nautilus...
+ 26 Aug 2009; Jeremy Olexa <darkside@gentoo.org> + thunar-volman-0.3.80.ebuild: + amd64 stable, bug 282664
x86 stable
Stable for HPPA.
alpha/arm/ia64/sparc stable
ppc stable
ppc64 done