Many new tools for internet marketing!

There are so many new products, or I should say services for internet marketing these days. I guess the original ideas of these services, most of them are online, are designed for "friend-to-friend" communication; similar to SMS, IM, and mobile text messages.

It is amazing how business people, such as the "maker" of the online service, or a marketing / business guy turns these online services into marketing tools. Now that almost everything can be "shared" if you want to, by just one click at an icon. For example, Facebook, MySpace, Twitter, Digg, etc. Companies join these services and advertise themselves FOR FREE! Up until now, these services are free to join; but I wonder if they are going to charge for "sharing" in the near future.