Fanuc offers classes at Rochester Hills MI. I have attended one of them and it was outstanding. I believe you can register for free on their cRc website. There you can access the training schedule and a limited number of engineering bulletins. I am not sure if you need a robot F-number to do so.
They don't give away manuals or training though. We just spent over $200 for a PalletTool manual that we were missing our most current revision.
I have not found any online resources either. I have looked for forums too, with very few active topics out there, none of which were useful to me.