The way Evolution is packaged it currently has a runtime dependency on gnome-pilot.
evolution-2.8.0-7.fc6

rpm -qR evolution | grep pilot
gnome-pilot >= 2.0.13
libgpilotd.so.2  
libgpilotdcm.so.2  
libgpilotdconduit.so.2

The gnome-pilot dependency pulls in various dependencies in the pilot stack.

Suggest that for Fedora 7 and beyond the built components depending on
gnome-pilot be factored out into a separate evolution-pilot subpackage in the
evolution specfile, which would take the Requires: gnome-pilot and this
subpackage be made optional in the Fedora comps file, since not all Evolution
users will want this stack.  The Evolution specfile would still have a
BuildRequires on gnome-pilot-devel

I believe it's just the pilot conduits that would need to live in this subpackage:
rpm -ql evolution | grep conduits
/usr/lib/evolution/2.8/conduits
/usr/lib/evolution/2.8/conduits/libeaddress_conduit.so
/usr/lib/evolution/2.8/conduits/libecalendar_conduit.so
/usr/lib/evolution/2.8/conduits/libememo_conduit.so
/usr/lib/evolution/2.8/conduits/libetodo_conduit.so
/usr/lib/gnome-pilot/conduits/e-address-2.8.conduit
/usr/lib/gnome-pilot/conduits/e-calendar-2.8.conduit
/usr/lib/gnome-pilot/conduits/e-memo-2.8.conduit
/usr/lib/gnome-pilot/conduits/e-todo-2.8.conduit