While everyone is basically aware of the fact that EVE capsuleers can now coordinate with DUST infantry to deliver orbital strikes, what you may not know is how the factional warfare aspects of both games synergize. In EVE, factional warfare involves earning enough victory points to wrest control of a particular star system away from the local militia. In DUST, mercs who manage to subdue militia districts on the ground make it easier for their EVE counterparts to mop up and take control of the system (or vice versa, as DUST mercs can also make things more difficult).
The post goes on to point out that the current interaction between EVE and DUST is intentionally limited so as to ensure a smooth launch and integration of the latter title. Over time, though, CCP plans to add plenty of bells and whistles, all with the ultimate goal of granting players more ways to pursue power and ISK.