I noticed that with my most recent upgrade to iPhone OS 3.1.2 that I can now enable 'Internet Tethering' under the network settings.
Excited at escaping my $64/month marriage to Verizon, I plugged the phone into my Dell Mini USB port and the Mini detected the iPhone at least to the extent of adding a new iPhone item to Network Preferences. However, tethering does not appear to be working on the Mini side. I get an error message "Either the cable for iPhone USB is not plugged in or the device is not responding."
The typical workaround might be to use Bluetooth tethering instead, but since my Mini doesn't have Bluetooth, that isn't much of an option for me.
Has anyone else gotten further with tethering the Mini to the phone?