Apple has updated a knowledge base article for those "Unable to use Wi-Fi or Bluetooth with iPhone or iPod touch because there's no address listed for the device", which is something we've heard quite a bit about lately. The four-pronged approach:

  1. Settings > General > Reset > Reset Network Settings
  2. Settings > General > Reset > Erase All Content and Settings.
  3. Restore the device via iTunes
  4. Take your iPhone or iPod touch in for repairs.

Apple finishes off with some extra advice:

If the device shows an address in the Wi-Fi Address field and you are still having issues using Wi-Fi, refer to article 305715 for additional Wi-Fi troubleshooting tips. If the device shows an address in the Bluetooth field and you are still having issues using Bluetooth, refer to articles HT1843 and HT1664 for additional Bluetooth troubleshooting tips.

If any of that works for you, let us know in the comments. If it doesn't, let us know as well...