I will try to finalize the Guide to Installing OTA 4.1.2 on 14Oct2012
The process is easy if you follow the procedure and will even show you how to force the download of the OTA
Caution If You Are Rooted:
The OTA removed root from my tablet, but there is a simple way to retain root using Voodoo OTA RootKeeper. Maintain some patience and I will post a tutorial on forcing the OTA and retaining root tomorrow and installing from the download image.