I am so behind on Sarah Jane. I just got Season 2 on netflix, but it's in the queue behind Judgment at Nuremberg and Telford Taylor's Memoir. Io9 just had a blurb on that very issue and I thought the same thing -- how Sarah Jane, the pain of being left aside, is busy doing the Doctor's work here. http://io9.com/5673242/the-doctor-who-reunion-episode-weve-all-been-waiting-for
I don't remember the companion Jo at all, but I do want to see this story arc, because it is RTD, because it is Sara Jane and the Matt Smith Doctor, and because of its message about getting on and how one does that.