With WDNA-FM's Steve Radzi laying his Reggae Beat to rest after nearly twenty years, the Caribbean radio crown safely belongs to Clint O'Neil, who has provided the tropical soundtrack of choice for night owls since 1979. Aside from those gravel-voiced Bob Marley-show IDs (recorded back in the late Seventies, when Marley frequently dropped by the studio for some hangtime with O'Neil), what raises this program above the Jamaican-centered competition on several local pirate stations is its unabashed variety. Tuesday through Friday from 1:00 to 5:00 a.m., and Saturday from 1:00 to 7:00 a.m., you'll hear the latest dancehall out of Kingston, but O'Neil is just as likely to launch into a set of vintage roots reggae -- not to mention soca, calypso, or any of the other island music that gives this late-night treasure its apt name.