I can report that Wireless Tether Version 3.1 Beta 11 works perfectly on my rooted droid 4. The speeds are incredible, im getting tethering speeds of 18mbps, and i watched a 1080p youtube video with absolutely no lag. im really loving 4g.
EDIT: i strongly suggest only using a wireless tether while plugged in and charging. you will absolutely murder your battery life during tethering