Sylk, a recent hip-hop transplant from Philadelphia, took to Miami like an alligator to the Glades: He slid right into our cacophonous subtropical airwaves and made them his own. Shortly after his arrival, people began talking about "The Roll Call," his twice-nightly homage to listeners. "What's up, y'all, so what's it gonna be? Now, who's on the line with your homey Al B.?" People of all ages call in, usually right in sync with Sylk's rap, and "shout out" to their friends. Caller: "Tasha's in the house." Sylk: "Oh, baby." Caller: "Mica's in the house." Sylk: "Baby, baby." When callers stumble and miss a beat, they'll be gently chastised by Sylk: "You're a dodohead!" Miami's most popular DJ, 29 years old, also instituted the nightly A-Team announcement. At the beginning of every grading period listeners fax in school report cards. Sylk then picks people at random and calls them at home to congratulate them on the air. Even when he's shouting "Whoooo do you love? 'Cause you got to looooove somebody!" to close his Friday-night show, Sylk doesn't preach so much as he invites his audience to have as much fun as he's having.