The Deep Impact mission went off without a hitch this morning. NASA's Deep Impact probe smacked into comet Tempel 1 after the probe parked itself in the path of the oncoming comet. The other half of the probe photographed the encounter from a safe distance.
Many very good images and details are on the Deep Impact website at NASA
It was very cool to watch. I'm looking forward to the replay of the post-impact press conference, which should be viewable on NASA TV at 2 (for JPL). At 4 there is a 3-hour live interview, with a replay of the post-impact press conference from HQ at 7.