Some timeline info that I think I've got right (please let me know in the comments if you've got better info). Times are PST:
6:45 - NASA TV begins Mars Exploration Rover coverage.
8:29 - Spirit enters martian atmosphere at about 12,000 mph.
8:33 - Spirit has slowed to about 1,000 mph.
8:34:40 - Parachute opens at an altitude of about 30,000 feet, and Spirit slows to about 200 mph.
8:34:54 - Airbags inflate, retro rockets fire, the spacecraft slows to a hover at about 60 feet from the surface, and spirtdrops to surface.
8:35 - Spirit Touchdown.
(about) 8:45 - Radio signals from Spirit begin to arrive at Earth and we start to get the reports that Spirit will have broadcast about every 10 seconds of the descent.
