So after a bit advice from NotSpavin I've been tinkering with Aperture and getting some nice results, well considering I've been using Auto all the time it makes a nice difference. I'm going to head out to an event going on down the beach now, there's a wakeboarding competition going on and I want to try and get the kind of image where the competitor would be in focus, and the background would be blurred out. You know, the kind you see of racing cars etc. I've only got a D40 with Nikon 18-55 and 55-200mm VR lens. Any advice?