Have you tried Skype yet?

If you would like to have free phone calls then you must check this out. Go to www.skype.com and download the little application and install on your computer. Send it to your fiends and you can have voice communication with them using your internet connection.

I have been using it for a couple of weeks and I love it . I can up to 4 people on a conference call and once you stop talking over each other its great. You can also use Skype to call normal phone numbers once you set up an account and deposit some money into it.