Redback Networks, which helps Internet service providers speed up service, ahead 845% .

FORBES: A Year for Sizzle

The hottest: Redback Networks, which helps Internet service providers speed up service.

FORBES: Venture Vetting

His big scores include streaming media outfit RealNetworks, which went public in 1997, and RedBack Networks, a networking company that went public in 1999.

FORBES: Magazine Article