FWIW, I just rooted my NST successfully using the MinimalTouch method described at
http://forum.xda-developers.com/show....php?t=1346748.
I had at first chosen the seemingly simpler method TouchNooter described at
http://forum.xda-developers.com/show....php?t=1343143, but the rooting attempts did not successfully complete, leaving my NST is a usable (in stock mode) but messy "partially-rooted" state (e.g., apps installed but not working). I tried to restore the NST to stock form using n2T Recovery process
http://forum.xda-developers.com/show....php?t=1289233 but that didn't work for me. I next tried the Touch Formatter method and was able to restore the NST to stock form (albeit at a previous firmware version 1.1.0).
Having gone through this process, I would recommend the following course for rooting an NST:
1. Do a full back up of the NST using this backup method:
http://forum.xda-developers.com/show....php?t=1142983
2. Root the NST using MinimalTouch method
http://forum.xda-developers.com/show....php?t=1346748. MinimalTouch's 2-step process seems more complicated on the surface but is fairly straightforward in practice (plus it provides the option of a partial backup/restore of the NST).
3. Use TouchFormatter
http://forum.xda-developers.com/show....php?t=1475613 to revert to stock form if the rooting process fails to produce the expected results.
4. Use full restore method
http://forum.xda-developers.com/show....php?t=1142983 (using the full backup image in step 1) as a last recourse in case of a fatal failure.