If I won, then I would have my wife call the canary islands. She spent a few years there doing service around the different islands. She has lots of friends that she would like to call, but it simply costs too much.
I would call Chuck Norris... As he doesn't pick up with his phone, but with his hand to talk to me... I would say I got a Galaxy Nexus, and that his hands are stupid...
I'd call my parent's and extended family that I lost communication with. I might even give the credits to my GF that doesn't have a phone so we can talk while I'm away at college.
I would call my friends in Indonesia and Kenya who are feeding the homeless and taking care of the people on the streets. One group of people they take care of lives in a Graveyard.
I'll probably just call some online friends that I have. Poland, Australia, etc... normal international calling prices would be really bad, so usually I'm content with just talking to them on Facebook. But this would be cool too!