We need a centralized market for matching co-authors.  I want to be able to go there with an idea and find a co-author who has some expertise in the area.  I guess there are some obvious difficulties.  For one thing, the researcher with the idea would worry that his idea would get stolen if he went shopping it around publicly.  Also, potential co-authors would have little incentive to invest in an idea brought to the market by someone else as it would be public knowledge who was the creative partner and who was the “research assistant.”

I suppose the second-best solution is a blog.