The Deadlift is hands-down one of the best exercises you can do. It uses almost the entire body from the neck muscles down to your feet.
Myles Kantor interviewed Mark Rippetoe for EliteFTS about the deadlift. Here is part one:
Going Deeper into the Deadlift with Mark Rippetoe, Part 1
And here is part two:
Going Deeper into the Deadlift with Mark Rippetoe, Part 2
Part two is especially interesting, because Mr. Kantor presents Mark Rippetoe with videos of successful powerlifters for analysis. You can get some useful insight into why their deadlift form is good. It's a great technique analysis of successful lifts.