Here's a sketch of my vision of how to make something like the original PLoS Hubs vision (see The demise of the @PLoS Biodiversity Hub: what lessons can we learn? for background). In the blog post explaining the vision behind PLoS Hubs (Aggregating, tagging and connecting biodiversity studies), David Mindell wrote: So, first up, some basic principles. The goal (only slightly tongue in cheek) is for the user to never want to leave the site.