Social networks, which were once reserved only personal contact, have now exploded into so many aspects of our daily lives. Through Facebook and Twitter, companies promote their products, celebrities communicate with their fans, individuals spread the word about a cause or event and perspective employers can seek out that perfect candidate.

Last week, Facebook announced they reached 500 million members. This milestone is even more amazing considering the growth of Facebook over the last few years. The social networking site reached 100 million members just two years ago. Since February of this year, 100 million more members have joined.

Judging by the number of GMT users with Twitter accounts, I can deduce that most of you think that Twitter is a powerful communications tool or at least that it has potential and everyone else is doing it so you should too.

There is a new social networking website that is increasing in popularity and it’s called Foursquare. For those of you that have not heard about Foursquare it is a website that allows you to tell your friends where you are, by checking into various locations. There are a few practical applications for this network.