[gprimr1]

Tethering and internet sharing are different. (At least to me)

Tethering is using the phone as a modem, where you dial #777 and connect. It uses the PAM plan, which isn't available with the everything plan.

Internet Connection Sharing (the cab described here), allows your computer to share your phones connection. Your phone makes the connection to Sprint, not you, so it looks to Sprint like the phone is connected. And with more data intensive apps available, it's getting easier to hide ICS.

Both require a USB cable.