Google has announced a competition to give you a chance to win an Ice Cream Sandwich bearing Galaxy Nexus via their Galaxy Nexus Twitter Page and their Android Google+ Page. The competition which starts at 9am PST(4am AEDT tomorrow morning) runs from the 12th to the 21st of November and is open to Australian residents as well as residents of Canada, France, Germany, Hong Kong, Japan, Netherlands, Singapore, Spain, South Korea, the United Kingdom or the 50 United States and the District of Columbia and because of the wide variety of time zones covered it appears they have different times they will be sending out clues or puzzles.
You have to follow @googlenexus, so yes you have to be on twitter to enter as this is how they will feed the clues on how to win. Google did run this competition when they released the Nexus S and the challenges ranged from brain bending to artistic so everyone is in with a chance. Full terms and conditions for the competition can be found here, so make sure you read them.
I`d love to hear of an Australian winning one of these phones but from memory the puzzles were quite difficult so good luck to all.