And now the results, please. The ChemCam's LIBS setup has three spectrometers that work in the UV, the violet, and the visible and near-IR, respectively. The first analyzed rock, dubbed Coronation, is (or maybe by now, was) 2.7 m away from Curiosity. The resulting spectrum of 30 laser shots, seen below in squashed form (the larger version can be found at http://www.nasa.gov/mission_pages/msl/multimedia/gallery-indexEvents.html) shows many lines of metals and other elements, including carbon and hydrogen. Interestingly, the hydrogen only showed up in the first laser shot, indicating that it was only on the rock's surface. Note the sensitivity (very small peaks for titanium and manganese) as well as the fact that the x-axis scale is somewhat nonlinear.
However, as I mentioned earlier, conditions are quite different here on Earth: instead of vaporizing rock, curiosity merely killed the cat.