I think the S-On crowd will be fine with HTCDev, though I did spot some discussion of new tokens.
What I meant was that the S-Off crowd are not able to change the lock flag in both directions, at least not using revone. Couple of people at XDA tried it, and while able to lock they could not unlock: see this post
and the one below it, for example. Of course if you are S-Off you can just change the hboot, but that was the point where I decided I'd feel happier running a hboot where the tools worked.