I have recently become a big fan of Skype and find it works very well. I use this Euro based internet phone service now mostly in place of my cell phone, as I don't want to rack up endless minutes. I think Skype will eventually allow me to drop down in plan, and save in a month what skype costs me in a year. Skype makes calling family and friends in Europe also less of an issue aswell, with a cost of about $1 for about 45 minutes of chatting.
Bell South lost their business with me about a year ago for crappy customer service and they are not getting it back anytime soon.