I did a post a few years back about a sketch service I was toying with, researchAgenda.
I have not done much else with the idea, apart from on occasion something similar in idea, the opening up for collaboration in, not just doing research, but finding what to do the research on, comes up. I found a few sketches and briefly inked them. I may add some more notes to this post over the next couple of weeks, to get all the thoughts down in one place to make it easy to point at.