Demetrios Leontaris knows more about your iPod than Steve Jobs ever will. He cruises around New York City, using his car as his mobile office/workshop, and fixes whatever ails your little Apple wonders, generally right on the spot for a flat $70 fee. He’s not alone either; Fortune identifies at least half a dozen iPod repair services in NYC alone. There are 150 million iPods out there, and Apple really isn’t all that interested in fixing them — they want to sell you another one. Apple does some repairs under