Hi Mr Jeff, good questions you ask and comments made!
I too am surprised we haven't seen an announcement confirming arrival of the rig on Obi but assume its happening at present, and since it was previously announced that the MD was flying to site (via a slow boat, lol) to greet the rig I presume thats the reason for the delay in providing the news. Actually your observation about the share price still being supported seems to me is certainly some expectation of the rig either there or close to being there now! (Its also a leaky boat, lol, just imagine what will happen to the share price if visible gold in core is leaked out, of course subject to that happening!).
About the artisanal mining area, from what has been announced so far ATN is working out a far more efficient processing route for them that also takes out the mercury, but since the artisanals are theoretically restricted to the top zone only, I think its the top 25 metres only (despite earlier diggings going down to 50 metres in places) then ATN are providing the procession for that initial phase of mining/processing within the artisanal area, of which ATN shares 25% of the profits. Thats how I read it.
The bigger 1 million oz resource of course is another story, for ATN to mine and develop in a proper and more cost effective manner with conventional mining/processing etc.