A couple weeks back, Rick Sammon posted on his blog about a plug-in called Perfectly Clear. He also talked briefly about it during the workshop we attended. I finally got around to trying it out a little bit today.
In this case, the effect is subtle, as I'd already done a fair amount of work on the image. But, the already decent image got a lot snappier after a literally single-click adjustment.
Here are a few more I fooled around with at lunch today. Some worked really well.