To paraphrase David Lee Roth: "He's your Ice Cream Man, stop him when he's passin' by." ...Or pedaling by, as the case may be. Rob Hess is the bicycle-bound peddler (and pedaler) of Go! Ice Cream, the latest addition to Ann Arbor-Ypsi's army of hand-crafted, small-batch food artisans. We, for one, welcome their invading forces.