send-to pidgin plugin currently doesn't list contacts from a WLM account. I'll attach a patch against 0.14.0 that adds pidgin-msn-pecan support.
Created attachment 182759 [details, diff] Patch to add msn-pecan support.
Created attachment 182760 [details, diff] Patch against nautilus-sendto-0.14.0 ebuild
I thought <nautilus-sendto-1 didn't work with >=nautilus-2.22. This ebuild also doesn't belong to gnome but to compnerd who's retired so if you want to pick it there's no problem on our side.
I just filed an upstream bug[1] for 1.1.1 1: http://bugzilla.gnome.org/show_bug.cgi?id=572760
The fix was in 1.1.2, which is now in tree.