So I have been trying to get onto AUGI since Wednesday and it finally opens up the forums this afternoon and all is now clear.
AUGI as we know it is currently off the web. And all previous threads a gone, temporarily or not that is one scary thought!
Not just for Revit users, but for all users. Particularly AutoCAD. There was years of information stored in those forums. And when a problem occured with any Autodesk product, I would generally go to AUGI before I go to Autodesk support
This thread speculates what has happened, but it appears to be a problem with the old ISP
Hopefully they can retrieve and reinstate all the old threads
Either way my vast collection bookmarked threads will be useless I am guessing!