Now here's what you'd call a niche market

What happens when you combine social media with a highly successful crowdsourcing project? Well, from a ridiculously unrepresentative sample of one tweet, you get a pointer to a "very useful web site", http://www.howmanypeopleareinspacerightnow.com. Useful, I suppose, if you're the type of person that really needs to know how many people are in space right now, but somehow doesn't already know the answer (it doesn't change that often, and when it does, it's on the news).

Even then I have doubts. When I chased the link it was still showing 12 (6 on the ISS and 6 on STS-132), even though Atlantis had landed for the last time hours before. So our hypothetical seeker of space population data would still have had to look elsewhere for the truth.

[The site is still there ... and they now have an app.  At this writing, the number of people in space is: 6 --D.H. Dec 2015]