Wow, it was interesting seeing who'd aged well (Sherilyn Fenn (Audrey Horne), Ray Wise (Leland Palmer) and Sheryl Lee (Laura Palmer)? All looked great (though I knew Ray was looking good). Dana Ashbrooke (Bobby Briggs) and Lenny von Dohlen (Harold Smith, the guy with Laura's secret diary)? both looked reeeally really rough.
First reference- 3 seconds in, about silent drape runners.
Most blink-and-you'll-miss-it reference: the moose-head on the table at Bob's house (which was Dana's character's name).
They gave me just enough about the show to grasp why what I was there for came up and still snicker at the characters who weren't special guests.
Pretty awesome stuff, all told. And if you didn't watch it yesterday night you missed out on the blooper reel as well as about 5 minutes of other stuff that boiled down to a fairly humorous '...Dual Spires is pretty intensely whacked, let's get out of here'.