I'd triedto install BloGTK on my amd64 machine but it needs gtkhtml2 python module to work. I'd re-emerged gnome-python with "gtkhtml" use flag to provide the needed module but for my surprise BloGTK still fail on gtkhtml2 module. Looking at toogle I saw that gnome-python was splitted in some other packages and now we have gnome-python-extras on Gentoo to provide gtkhtml2 support but it is not installed even with the flag on the USE variable. I do think gnome-python-extra need to be marked as a dependency of gnome-python when gtkhtml2 useflag was turned ON.
gnome-python shouldn't install gnome-python-extras. There was a bad dep in blogtk, which is now fixed.