This was from my first real outing with our new Canon 7D. It was glorious :).
I took my test shots at ISO 3200 and f/2.8, then multiplied the shutter speed by 64 to shoot the final image at ISO 200 and f/5.6. The exposures were a little over six minutes.
Luckily, I was with Patrick, and he spent that six minutes with me while I stressed over how close the waves were crashing to my tripod :). Check out his shot here.