I came across this blog post which breaks down the number of active users on various social media platforms.
No surprise that Facebook has the highest numbers.
I thought Trello was quite low, considering how much I love it.
Interesting number on Tumblr – I’m not sure who uses that service. I should probably look into it more.
I can’t wait to see what happens with Google Plus. The more I use it, the more I love it.