Free Calling Anywhere in the US

So I found this link through the socialspark.com webpage and I thought this was really cool. People with Skype can make phone calls from their computers for a small fee to anywhere in the world, but if you're only planning to call throughout the United States, then this might be the site to visit. All you need is a computer microphone so you can talk, type the number you want to call, and then place the call. It's pretty cool. Advertisements don't interupt your calls. The catch is that calls can only be made for 15 minutes at a time, however you can call an unlimited number of times. Check it out.

CallingAmerica.com Free USA Calls !