yep, sometimes LightZone is used here, in the version without the imagebrowser, therefore for retouching only.
Beeing coded in Java, it likes heaps of RAM!
It's correct, behind LightZone are different thoughts about HOW to edit images than PS, it's less tecnical, less abstract. For certain tasks, LZ does the much job faster and easier, because it's different. Another advantage of LZ: you can save a template, which contains all the editing steps, and apply it with 2 mouseklicks on other images. Thats not possible with PS, so I use it when shooting series with similar objects.
Dodge and burn is a intergral parth of LZ.
At Uwe's outbackphoto.com, you'll find much more info's about LZ.