Here are some of the latest VoIP Service Provider deals I've seen pop up.

Viatalk VOIP service (Reviews) is offering 2 years of unlimited VOIP service for $199. Valid for the first 1000 signups.

Sunrocket has a buy 1 year at $199, get 1 year free until 9pm Pacific time. Unlimited calling to the U.S., Canada, and Puerto Rico.

Click here
Click on Sign up now.
Click on the Home tab on the top left.
Click on have a "promo code?" and enter code RRRyfuf.

OTHER:

Free local phone # with incoming calls from AimPhoneLine. Available in select areas.

Skype has announced that PC-To-Phone calls to US and Canada customers are now free at least through the end of 2006. You may have to download the latest version of Skype, and use the following format to call: "+1 555 555 5555".