I visited the Jet Propulsion Laboratory (JPL) in Pasadena, CA and watched the Curiosity rover being built. Here are some photos of the clean room in which the craft was being assembled:
[I haven't found them yet.]
At 8:30 p.m. PDT, JPL promises to begin streaming live coverage of the landing. At approximately 10:30 p.m. PDT, Curiosity is due to touch down on the surface of Mars. Here is the site that promises to stream live coverage of tonight's landing.
Here and here are links to the official NASA pages describing the vehicle.
Here is an article from the New York Times on the upcoming Mars landing.