Ok, I got my Droid Razr MAXX today. First thing I did when I got home with it is root it. Root went fine as far as I could tell.
Installed WiFi Tether Hotspot from here: android-wifi-tether - Wireless Tether for Root Users - Google Project Hosting the newest version 3.1 beta 11.
When I start the hotspot, it seems like it starts the built in hotspot tether app as well (I see it pop up in the notification bar). And all is fine for a few minutes, but after about 10 minutes, the built in tether app closes and the hotspot stops working.
Any idea what the problem may be? I'm going to try another version of the wifi tether app, but figured I'd post here as well just in case I'm missing something else.