I use ThickBox with NextGen Gallery.
When one clicks on an image on an NextGen Gallery album page, a large popup image is displayed with caption and next/prev links. The background is grayed out. I like this simplicity of the default view.
To that popup image I would want to add minimalistic arrow key navigation. I would like "<-" to show the previous picture and the "->" to show the next. (Maybe even some fade-in/fade-out arrows like in Flashviewer/AutoViewer)
Does such a minimalistic plugin exist?