From the Developer Relations point of view, it would be very useful to find a way to identify top contributors of Labs. What makes you a top contributor in Labs is to be defined. The problems to solve are similar to the problem of knowing what are the most remarkable tools in Labs: either you are an insider and know by heart, or you need to contact everybody and see who responds.
Knowing who are the top contributors would allow us to help them better inviting them to Tech Talks, events, meetings to gather quality feedback...