Some opinions (Haven't read any WoT since the last book came out, I'm a little rusty):
Logain is in the light.
Mazram Taim is probably a darkfriend but not a Forsaken.
Elaida isn't black ajah, she's just dumb.
If you haven't seen it already, the <a href="http://www.darkfriends.net/wheel/0_admin/0.01_intro.html">Wheel of Time FAQ</a> has a ton on all of these topics.