I don't think we would be the society we are today.
There is nothing on the internet that you can't find in a decent library, so our knowledge would stay the same (it would take so much longer to research though!).
But things such as social networking and the media industry would not be as advanced at all.
I guess that without networking sites and software such as Skype and Facebook, technology would have enabled us to invent a highly advanced text service on the mobile phone instead of updating social networking online. Apart from that, accessing news, data and socializing across the Globe would be nowhere near as advanced as it is with the internet.
The internet has become such a booming industry and has given many people jobs, jobs they would have elsewhere if it did not exist, so I suppose we would be more advanced in other technologies, such as television and mobile phones.