If sales volume (from limited time) is measurement of success and flop than OSX is a flop compare to Windows7.

I don't know in which world is selling a new phone of 135k units by a newcomer in the hardware/phone industry is considered a flop.

Nexus One is Google first shot at a phone on an already heavily competitive industry. Without having any experience is selling/producing a consumer product like this, I would say this is a pretty good result for a first time. Come back after 1 year and another iteration of the phone and than we can talk about numbers and perhaps decide whether its a flop or a success.

For now, the way I look at it, its an experiment in progress.

I don't even own an andriod phone. I am still happy with my iphone. But when my contract expires I most likely will consider an android phone.

USA is a matured and very competitive cell phone market, its not very easy to get existing phone users who are committed to their phone contracts. Getting a new phone is a fairly long term commitment for most users.