Can I set up Wi-Fi and USB tethering on the Galaxy Nexus without rooting it?
ClockworkMod Tether does USB tethering without root and Bluetooth tethering is planned (it's still in alpha).  Unfortunately, from what I understand only Windows, Linux &amp; Mac OS will be supported, but who knows what will happen in the future (maybe Wi-Fi support).  Koush's apps are great.