We have updated the original version of our map of social networks, which was first made two years ago. Things have changed quite a lot since 2009: many networks have disappeared, Facebook and Twitter have become stronger, new categories have surged (as social commerce or Facebook games), new functionalities have to be considered (mainly, localisation) and Facebook pages have become very important as social networks by themselves. At the same time, Facebook has conquered most of the world.
Missing:
Xing – German by origin but now used internationally. Falls in the same category as LinkedIn
Hyves – The Dutch version of Facebook. Now also used internationally.
Wer-Kennt-Wen – The German version of Facebook but without the games. Used primarily in German speaking countries.
Tripit – much used international travels sharing
Hyves and Xing are too local. Also Wer-Kennt-Wen. Tripit could have made it 😉
Where is Google+?