I've been on Facebook and LinkedIn and Xing for quite some time now, and yesterday I finally joined academia.edu. I'm not sure anymore why I did not go there and sign up when I first heard about it, but probably I was intending to wait and see whether it would take off or not. And then I sort of forgot about it.
So I'm very glad a colleague on the weekend nudged me to go there again and sign up. The idea behind it really is brilliant - a place where you can put up links to your work, copies of your articles, your academical CV - and at the same time see what others do and follow their work. It feels like a mix between Facebook and Google Scholar for me.
I can be found here on academia.edu - care to join me?