Well it looks like some more information has come out already. It looks like the plan is asteroid mining of NEO's. Although they won't be doing that right off the bat. First they'll spend some time prospecting and looking for the best rock they can find. The goal is to find water as well as Platinum-group metals (ruthenium, rhodium, palladium, osmium, iridium, and platinum) which can only be found in low concentrations here on Earth.
Here's the space.com article: http://www.space.com/15395-asteroid-...resources.html