Mark Ellis, a.k.a. Flood, is an engineer and producer nonpareil. His big break came from engineering U2's The Joshua Tree for super-producers Daniel Lanois and Brian Eno. Flood must have taken notes from the masters, because by the time of '93's Zooropa, he was sharing producing honors with Eno. He's since attracted the biggest names in rock, including The Killers and Nick Cave.