NEVSEHIR, Turkey -- Sadegh Shojai fled Iran after government agents raided his Tehran apartment, seizing his computer and 700 copies of a book he published on staging revolutions. Now, he and his wife spend their days in this isolated Turkish town in a cramped, coal-heated apartment that lacks a proper toilet. But Mr. Shojai, 28 years old, continues to churn out articles on antigovernment Web sites about Iranian political prisoners, and helps to link students in Tehran with fellow students in Europe. "I feel very guilty that I have abandoned my friends and countrymen, so I make up for it...