The incident occurred at 9:56 of the second period. Staal received a minor penalty for boarding on the play.
The fine money goes to the Players' Emergency Assistance Fund.
Via The Pensblog, here's video of the play in question.
Staal pretty clearly shoves Coburn, but as soon as that's over, he bends over Coburn to make sure he's not hurt. Staal doesn't have a reputation for being a dirty player, and he showed remorse almost immediately. It looks like Coburn mostly just got in his way. Still, the NHL can't have plays like that, so it's hard to take issue with the fine.
The Penguins won the game, 6-4. They host the Buffalo Sabres on Sunday afternoon at 12:30.