OK so I was bored and decided to take a bunch of night pics with the iPhone to test the performance. It did better than I expected but night photos still suck just like any other camera. I posted them ALL for anyone to see but be warned there are upwards of 80 pics and I have not thumbnailed or compressed any of em so it may take a while for them to load and you'll likely get bored before you finish looking.
http://www.reimuchan.com/iphone/iphonenightpics.html
http://www.reimuchan.com/iphone/iphonenightpics.html