Pocket Jacks in Position on a Q-x-x flop

As everyone knows, JJ is one of the most difficult hands to play correctly in hold 'em. Unlike the other premium pairs, there is a greater than 50% chance that an overcard will come on the flop.

I've posted this hand for discussion on the Low Limit Forum. I was dealt JJ and flat-called a standard raise from the first position player. Everyone else folded and the flop came:

Q 7 8 unsuited

The UTG player bet half the pot and I ...?

(I raised. But not everyone likes that play, as I quickly learned.)