Howard Stern has long cast himself as a take-no-prisoners rebel, but he’s had some real targets for his anger since last April, when the Federal Communications Commission fined him $495,000 for indecency as broadcasters around the country cowered in fear that they’d be next. “Now Howard Stern is taking on not just one establishment but two: the FCC indecency cops and the terrestrial radio conglomerates. That makes him not just a vulgarian, but a renegade.” As he pulls up stakes for Sirius Satellite Radio, will his quest for freedom of expression — and his huge fan base — fuel a revolution?