the nitty gritty: 1. its out of focus, watch out for that, put your central AF point on the point of most important focus and hold the shutter release at the point just before it would release, recompose, then snap the shot 2. go wider and get closer to fill the frame more with the dj but to keep his environment in context 3. use a slow shutter speed to let in some ambient light to mix with the flash so the lighting isn't so flat/front
find shots similar to what you want to do, and examine what the photographer did in that situation, you'll learn fast - and read read read
Oh, yeah, I meant to suggest the Kodak website for pointers about composition. The site has a nice, basic tutorial about how to set up shots for different situations.
Aaron, I would recommend getting in closer and getting some different angles. This image has a busy, uninteresting backdrop and is too small. Also, he has a post coming out of the nape of his neck.
I have a DC5000 and the flash unit is horribly underpowered, so I've started playing with a vivitar flash with a button slave attached. It works with my kodak digicam but may not work with yours because I don't have a focussing preflash. You might look into it.
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