The dbus-0.23.4-r1 ebuild works fine but all of the newer ones (0.50-r1 through 0.61-r1) cause an error like this when trying to open the "terminal" or "xfmedia" applications which are both xfce4-related:
terminal: error while loading shared libraries: libdbus-glib-1.so.0: cannot open shared object file: No such file or directory
You need to run revdep-rebuild...
That fixed the problem with terminal but xfmedia won't compile due to another bug:
I'm sure revdep-rebuild will fix xfmedia too once it compiles. Thanks!