(FORTUNE Magazine) – STEVE BURKE Burke, 44, is the second in command at fast-rising Comcast. But he won't always play second fiddle. His name routinely gets thrown around for possible CEO jobs in cable and beyond. (Disney, perhaps?)

SUE DECKER and DAN ROSENSWEIG Insiders predict that either CFO Decker, 40, or COO Rosensweig, 42, will succeed Terry Semel as CEO of Yahoo. We'll see. For now, they're the best young tag team in tech.

ABBY JOHNSON She's the No. 3 at the No. 1 mutual fund company, Fidelity Investments. Oh, yeah--she and her family own nearly half the place. You'd better believe Johnson, 41, won't be No. 3 forever.

JEFF ZUCKER This 38-year-old wunderkind, who became the Today show's executive producer at 26 and now runs both NBC Studios and NBC Enterprises, is the most promising young media exec around.