Crafty, as long as you are still S-Off it is that easy.
Download the stock, unmodified 1.44 hboot from this xda thread: http://forum.xda-developers.com/showthread.php?p=42379041
(assuming tapa hasn't mangled link - should be post 2 of sneakyghost's firmware thread). Follow instructions in the post to flash it. This is how I downgraded mine. With that hboot you can use revone to unlock.
I'm sure you can htcdev unlock anyway, but will have to backup & restore if you do that.
Of course you can try revone now, but people were reporting that it doesn't work.