The node set consists for now of eleven nodes (5 unique, and 2 sets of convenience nodes).
Sort with index
This takes a real-list as an input, and gives out a sorted list from highest to lowest number. More importantly it also spits out an index list of where the highest number exists in the input list. It does this in a highly inefficient manner mind you (at least I think so∞), so connecting it straight to an audio-rate node will choke your composition. Please see example for how to do so under somewhat safe circumstances.
One more example of a video-feedback rendering system.
A camera, slowly rotating, is in the center of a cube; the image captured by the camera is pushed through a few different colour transformations, and the results of those are painted onto the walls of the cube in the next frame. Zoomy rainbow trips ensue.
A "Combine image with feedback" node is included in the feedback loop, which blends the new frame with the previous one at a specified opacity. This arrests some intense strobing effects which would otherwise occur, and lends the image a softer, dreamier quality.