Yeah, should note though it hasn't officially been endorsed by Sprint, nor has it been confirmed that it will still be unlocked for everyone else. But on other boards users have tested the built in tether feature and right now for them it is unlocked. Whether it's a result of Sprint letting up on disallowing tethering of the phone due to charging an extra $10 monthly, or a simple slip up that'll be corrected soon after launch isn't known.
Enjoy.