This is actually pretty cool. For any Skype users in the US or Canada you can use the Skype out service to call any number in the US or Canada for the rest of the year.
I have already been using it quite a bit, and it has been working well.
All you need to do is use your Skype set up as usual and any number in the US or Canada will go through without needing Skype Out credits.
http://www.skype.com