Actually, sticking out your tongue is anti-social --- unless you are a cat; then it's just cute
I happened to be at the Kobo presentation yesterday. While they seemed to like the ability (not requirement!) to post to FaceBook, the most useful or interesting to me would be the statistics, or maybe the awards. Of course right now you have to have an iPad, later an iPhone or smart phone. Since I don't have an iPad, I'll just have to wait until rev 39, when the Kobo eInk device gets all the stats gathering and can sync it to the desktop app under Linux...