bought 2: 16GB - WiFi for my sisterFor those of us that have Wi-Fi issues (it goes to zero reception when iPhone or laptop receive a full signal) it isn't such a great piece of technology. It becomes even less of one when we are told that the next patch that *might* address the issue will be sometime in the Fall of 2010. See the long trail of complaints in the Apple forum or the post by Princeton University.
32GB-3G for myself
never saw any WiFi issue - works well at home, at Barnes&Nobles, at coffee shop, in my office
what are you talking about? There are always defective units out there.