I saw the Debbie Downer / Disney skit a few weeks ago. I laughed so hard that tears were rolling down my face. The skit itself wasn't NEARLY as funny as Rachel Dratch's inability to keep a straight face. Horation Sanz, who was also in the skit, had tears rolling down his face also.
I Tivo'd it so I'd have it forever (whenever I need to laugh, I turn it on).
In my opinion, that was one of the all-time funniest SNL moments.