Interesting to read this report.
http://www.firstenergy.com/research/documents/Facts-C-ORC_B-2011-12-14.pdf
So first of all, Orca could lose the Songo Songo PSA (and Aminex might be in pole position to take it over if Orca are ejected from it).
We also have confirmation that the Chinese pipeline being built could bring gas from down south to the capital (and yes so if Ntorya-1 is gas this can connect into this pipeline and so infrastructure is being put into place for by default for a Ntorya-1 gas find - but oil is more valuable of course so oil please but if not then gas).
The potential to take over the Songo Songo PSA might be another reason our Thai/Chinese friends are involved, they put the financial clout behind Aminex so the Tanzanian government know that money is not a problem now, if they were to give the Songo Songo PSA to Aminex then progress would be fast.