I don't seriously consider the G1, running Google's Android, an iPhone killer. I don't use the iPhone mainly because of the lack of a keyboard, bluetooth or the fact that there is no 3G service where I live, yet Verizons high speed network IS out this way.
CBS has this report and compares the two.
Do you use either one and if so what do you think? Shoot me an email and I’ll post some of the results here. Sorry about comments being turned off right now. Eventually they will go back on.