The USS's spawn mats (degraded threat 0 or 3) and commodities (need to pirate the convey uss's).
You can get everything in them that you can get on the planetside guardian structures bar the vessel/ module/ weapon blueprints for which you'll still need to do the pylon mini-game
Both are indeed available ingame atm and the commodities can be sold at The Prospect for above average price right now
As far as the next stage of the II which is the trade CG (for both mats and commodites) we will all just have to wait until the 16th when that goes live. This week (Phase 2) they just added the new assets - 2 x ferries, an outpost and an installation in the system we voted for (Phase 1)
Same as with any of the old CG's, if you know what's coming you can stock up in preparation the same as Ratkatcher, myself and others are, but until it goes live (Phase 3) there's not much else to do as far as II goes atm
Hope that helps