AFP has a good summary of the pre-touchdown jitters the Phoenix Mars Lander crew is living through. The spacecraft has been under way for 10 months. If the landing goes according to plan — and only about half of the three dozen such attempts have — mission controllers at the University of Arizona will receive radio signals from the Martian surface at 23:53 GMT. Here's the Mars mission home. You can (in theory) track the lander here, but at the moment the JPL Solar System Simulator is "experiencing technical difficulties."