Reach Millions of People

My dear friends

In the modern world of technology where the communication cost has become not only cheaper but also easily accessible and had become a part of our regular life. Even in rural areas the mobile has reached and the landline phone is a things of passed days.

My question is that is it possible to reach millions of people at no cost means by exploiting internet resources :



Some of them present in my mind are :

1) Social Networking Sites like orkut, linkedin, facebook, twitter, myspace, stumbleupon etc.

2) Using free sms facility available on different websites like fullonsms, way2sms, 160by2, etc.

3) Use of blogs, forums etc.

DO YOU KNOW ANY OTHER WAY TO REACH THE PEOPLES, PLEASE TELL ME?