Spirit on Mars!
The latest robotic NASA mission to Mars seems to be a success so far; the rover, named Spirit, has transmitted a signal indicating that it's landed safely. Whew. I've been distressed at the apparent loss of the Beagle 2 (I'm still hoping that it'll turn up; there are apparently several more possible opportunities to get a signal from it over the next couple weeks), so I'm very pleased to hear that Spirit made it.
See also NASA's official Mars Exploration Rover Mission site.