Mafiaboy (Michael Calce) is the highschool kid from Montreal Canada who took down Yahoo, Amazon, Dell, Etrade, Ebay and CNN in 2000. He was arrested by the RCMP and prosecuted. In 2001, he was sentenced to eight months of "open custody", a year's probation, a fine, and restrictions to his use of the internet.
Reader's Digest did an interview with him recently (Last year or two)