Cool another KM instructor!
Towel pull ups are a good sub for the rope climb. From the FAQ page:
The "official" CrossFit Warm-up is in the April 2003 CrossFit Journal.
3 rounds of 10-15 reps of
Samson Stretch (do the Samson Stretch once each round for 15-30 seconds)
Overhead Squat with broomstick
Note that for a workout that's dip or pullup-centric, you might want to do something else in the warmup.
(Message edited by jeff_m on February 13, 2007)