Plasma [moebio.com] is an interactive network (or should we say "animated heatmap"?) of links and tags that acts as a visualization experiment to inform ongoing research on aids. It takes an integral and holistic point of view of integrating any possible issue into a single visual map.
Each initiation seems to start from another (random?) set of keywords, so sometimes it is worth to reload the page or select individual tags to experience the potential of animating a network view by highlighting relative proximity instead of direct connectivity (edges).
Via Visual Complexity.