Social networking is the fastest growing form of internet marketing. There are many ways to use social networking as an internet marketing tool. Many clients have had success with having us create an icons on their websites that direct customers to social sites such as Twitter or Facebook, but we have found that actually posting your new content on these pages is much more effective.
Creating an application to run on Facebook or other social networking sites is another option. There are few companies that have gotten this extensive with social media and while it is more expensive, the end result is that your sites information will show up on peoples Facebook pages all over. As an example of this imagine if Ebay created an application so you could track your current bids on your Facebook profile page. You are writing about your day on Facebook and you notice your bid is now not the highest, you simply type in your new bid amount and click submit and you are now back in the lead. On the other side, lets say your friend Jim is looking at your Facebook profile he would see that you were selling an item and could bid on it right there as long as he was also a member of Ebay on Facebook! As far as we know this application does not exist yet, but that is the future of the internet and the direction we see successful internet companies going!