After creating the HDR in Photomatix, I brought it into Photoshop. There I used the Distort tool to straighten up the right side a little. I didn't like how much the sign post was leaning. I also used Unsharp Mask on everything except the plants. Grass, shrubs, and trees don't usually look right when sharpened too much. I increased the contrast on the two green street signs to make them stand out some.
It might be hard to tell at this size, but this photo has a ton of chromatic aberration, most of which I haven't corrected yet. That's the downside of HDR. It really increases that, and noise.