SNL's writers and former champions made this weekend's holiday episode a must see. Between Jimmy Fallon hosting, and the consequent cameo-returns of Weekend Updaters Tina Fey and Amy Poehler, the ever-absurd Tracy Morgan, and some charitable outreach for the less fortunate (Rachel Dratch, Horatio Sanz, and Chris Kattan) -- and the fact that it was the last ep before Christmukkah ...