Your hypothesis about a one-huge-deposit scenario is very logical! The company has its geologists working on a 43-101, which should shed some light on this theory.
One thing in particular that I learned when I did not properly eveluate Aurelian Resources was the size of its property. As thing turned out, Aurelian's property was loaded with gold.
I will be so bold as to say that Commerce Resources with this many thousands of acres with rich deposits is destined for success.
I included the link to the company web page below.
From my brief review of tantalum, I feel there is a tremendous current and growing need for this mineral in China and elsewhere. Particularly in China though where planning and securing resources are projected and secured for decades ahead.
As an aside, I'm a proponent of conventional peak oil peaking around 2010 or prior. This occurrence will severely impact many companies in the mining industry. A company which is situated near rail transportation [the second cheapest to water] and near a hydroelectric power source will have a great strategic advantage over competitors. Fortuitously Commerce Resources enjoys these power and transportation advantages. That will mean a great cost advantage in the future.
I just wish I had more funds to increase my position at the current price.