Somebody tell me how he does it! We've already got a winner to the most recent plant quiz, and it is Justin "Shotgun" Thomas. Justin correctly identified the plant in the photo as Trichostema dichotomum, blue curls, aka the bastard pennyroyal. Trichostema is translated as hair-stamen, for the capillary filaments, and dichotomum refers to the inflorescence forking in pairs.
Trichostema dichotomum is found in dry open woods and in clearings, and is currently considered Rare in Indiana (though I believe it will soon be downgraded to Special Concern).