Picture of Curiosity's dust scoop. Source
After drilling 2.5 inches into the Martian surface, Curiosity has collected a sample of Martian rock. This picture here is visual proof that Curiosity has succeeded in collecting the dust from the hole it drilled, letting scientists know that everything was successful. The next step is for the rover to sift this dust over a special sieve to get only finely powdered dust for analysis. I will continue to stay up to date with this story, and bring you all the news.
NASA's release on this story can be found here.