How do I enable USB tethering on a JellyBean device?
Yes.

On ICS the setting can be found at

Settings -&gt; Wireless &amp; Networks -&gt; More.. -&gt; Tethering &amp; portable hotspot -&gt; USB tethering

I think it should be at the same place on Jelly Bean. Note that you need a device with a cellular data chip for this feature. Devices without (e.g. the Nexus 7) won't show this option.

USB tethering support was added with the 2.2 (Froyo) release