Wednesday's MEDICINE BALL CARAVAN (11am-noon Central Standard on 88.7FM locally or www.krvs.org) airs tunes from the newest releases by Dr. John and The Iguanas. Also: some Tom Waits, The James Hunter Six, King Khan And The Shrines, Ike & Tina Turner, Walter Wanderley, The Nice and Mike Bloomfield & Al Kooper.