dbus-qt3-old : D-BUS Qt3 bindings compatible with old application API and new dbus ( http://freedesktop.org/wiki/Software/dbus )
glib : The GLib library of C routines ( http://www.gtk.org/ )
protobuf : Google's Protocol Buffers -- an efficient method of encoding structured data ( http://code.google.com/p/protobuf/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a rainyday
For Paludis use this rsync : rsync://gentoo.zugaina.org/rainyday-portage
If you have a problem : ycarus(-at-)zugaina.org