BeBo and MySpace are still around but have developed in to a niche market whereas FaceBook is popular to the masses.
Then along came Twitter. It started with them wanting you to 'tweet' about every single thing you were doing. Lots of people joined but soon got fed up with the mundane tweets. Luckily they made a point of letting people know about how mundane and uninteresting their tweets were and things began to change.
Twitter transformed in to haven for famous people tweeting about the interesting things they are getting up to and now it's more about following interesting people rather than tweeting about absolutely everything you do.
More recently the likes of FourSquare came along which I tried for a few months and just didn't get the point of the whole thing. I cant see what use it was to me or how they were going to make any money - at least twitter is now getting some money with advertisers being able to add a paid-for result to the words that are trending.
DailyBooth is another social networking site that has jumped on the Social Networking band-wagon and is basically twitter with photos instead of tweets.
Then there's the Social Network for business people to use, LinkedIn - this has recently floated on the stock markets for millions of dollars so how long before some others follow? It's only a matter of time and when they do, that's when the bubble will start to get bigger and bigger until finally it bursts.
