[fnurt]

I definitely check here. I don't see this board as especially non-threatening; lots of chances for someone to have a pair or straight draw here. The only reason to bet is to pick up the pot, which is unlikely to happen. On the other hand, you don't love this flop, but there are tons of turn cards that will help you.

You also have to be worried about the SB's potential holdings. I'm no pro, but where I come from, pros don't love to play raised 3-way pots out of position just out of boredom. He could very easily have something here.

I almost always make a continuation bet against a single opponent, but against 2 opponents, it's a judgment call. (I think Harrington says the same thing.) In this case, all the factors are very clearly in favor of taking the free card.