Here is what I think... like the background, the picture itself needs to be smaller, the text looks rank but would be easy to fix.
Try making the size 450x110 or something smaller, it would make it look a lot better. Then try making a pattern and filling a new layer with that pattern then switching it to soft light and lowering the capacity. Then use the circle tool and set feather to like 10x and cut a circle in the center of the image that only leaves the corners filled with the pattern.
Oh I'm babbling....
i got lost at 'a lot better.'
btw, instead of modifing im gonna take these tips to my next sig