As the chair of a math department at a teaching institution (and Hailing is right, we want people who love to teach, but keep in mind we also expect people to be active researchers), I would highly recommend looking everywhere for job postings.  Contacting chairs individually is great too, I can't imagine anyone would mind, and you might get lucky, things come up at the last minute sometimes.  I would suggest email is by far the best way to do that.  Good Luck!