Actually, the Nexus One has just become available from Vodafone here in New Zealand :-) It is a great phone, I've had mine for 4 months now (bought in the USA via a third party as was not available in NZ at that time). After a string of Symbion and Windows phones I can confidently state that it is the best phone that I have had to date. It is good enough that since I got mine, no less than 4 other people at the company that I work for have also bought Nexus One phones. And that is despite the fact that as it was not officially available in NZ at the time, considerable inconvenience had to be tolerated to get the phones at all. Google did not help in anyway.
Anyway, from my perspective, it is a great phone and am well pleased with it. It should be good for three or four years by then hopefully Google will have brought out another reference phone.