This would appear to kick iCal's arse.

"You can now create mouse gestures to do anything Quicksilver can do using a plugin called Abracadabra."

A triggers-centric tutorial on using Quicksilver. (I set up a lot of triggers when the feature first appeared, but tend not to use them much - it feels more 'natural' to me to use the QS interface, if a teensy bit slower).