You mean the HDR effect? Ideally you would take several (maybe 6) exposures of the same scene, all at different degrees of over and under-exposure, and then mere them in a photo software, so you get the detail of both the highlights and shadows. I don't have a tripod so I kind of faked it by taking the photo in RAW, then using Adobe Camera Raw (comes with photoshop CS2 and above I think) to change the exposure. I then save the image again with different exposures, and merge each of the edited ones. I doubt the effect is as good as if I had actually taken 6 photos, but it's nice.
Very very nice shot. I think the drama would've been upped by including more of the sky, but the reflection compensates for that. The amount of content sometimes flusters me, but that makes me like it more.