From now until the end of the year, calls through SkypeOut made to and from the US or Canada are completely free. Huzzah? Huzzah.
Skype has now removed any cost barrier for its American and Canadian customers to keep in touch with friends, family and business associates. Skype anticipates that completely free calling in the US and Canada will expand Skype's increasing penetration in North America and solidify Skype's position as the Internet's voice communication tool of choice. More people will now have the chance to benefit from Skype's premium services and online calling capabilities.
UPDATE - To be precise, Canuck-to-Canuck and Yankee-to-Yankee calls are free whereas Canuck-to-Yankee calls still ring up international rates.
Product Page [Skype]