Don't put alot more money in!! (duh). I sometimes lead here - first to act is not as bad as stuck in the middle with this many players - but that's when my table is super weak on the flop (i.e.,. they will not float or call with gssd rarely semi-bluff, etc.)

This flop is pretty horrid though. I would certiainly c/f if there were 2 suited cards out.

Folding pre-flop is probably best as well.