Fluids is, (well actually the ocean shader and texture), kind of interesting to work with, and KBrown and his Andria Gail thread knows the most here at SM about the trials of getting this type of shot to work belivably.
From my short research, I've had luck using the WAKE in combination with the Ocean shaders' y-axis foam emission ability.
So basicly, as the wake height gets above a certain y axis, the foam feature in the Ocean Shader kicks in, and makes it look as if it is being churned, and/or cresting.
Now, in your case, rip-curls and pipelines are a whole different ball of wax altogether.
From what I understand, Maya's ocean shader/texture cannot do this out of the box without some type of scripting to help it along.
You might have better luck getting a fluid container to do this with fields... not sure.
Lemm know if any of this helped ya
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS