Call Me Lord William

More information about Tyrannis' planetary interaction can be found from this Ten Ton Hammer interview with a senior producer from CCP. Some points of interest...

So the general idea is that everybody can play EVE, every player can do stuff on any planet, and the more people that use a particular planet, the less valuable it is for that particular player. And of course there are over 65,000 planets in the game. And you can interact with each and every one of them. Including those that are in wormhole space, which can actually be quite challenging.

 Emphasis mine.
And:

TTH: Right, right. Will there be a new set of skills that players will need to master?
Torfi: Yes. Absolutely. Your ability to master a planet, to manufacture, build up, and manage it, will be bound by skills. But again, the barrier of entry is really low. We want people to get in on and get a feel for this feature early. And also, I should mention that the planetary interaction should not be thought about as a feature to replace any action that is already going on in EVE, today. It's more augmenting and re-experiencing EVE. It doesn't require you to sit and grind. You go and you build up infrastructure, but then you set up some manufacturing cycles and infrastructure, and that interacts while you are playing the game. Then you can go back to it and make sure that everything is going well. Lube the machines, so to speak. And collect stuff from them to sell to someone else, or pick it up. But in general you can actually be playing and profiting from planetary interaction while doing all of the other interesting things that you can do in EVE.

More:

We're not saying that your installation in high-sec is going to get blown to smithereens the day DUST hits the market, but for low-sec and zero-sec, DUST 514 will definitely play a part of allowing you to mess up other peoples' infrastructure and have interesting gameplay connecting the planets and mercenaries down on the planets in a very meaningful way. A way that is yet to be revealed, of course.

Not done yet:

TTH: Will the planets have some manufacturing and research possibilities that are currently done on stations?
Torfi: They won't have the same, no. We are not going to be competing with the industry, research and manufacturing on the stations. And they're not going to be competing with mining. We are not replacing any of these game systems. They will be a separate ecosystem, so to speak.

And finally:

TTH: Any timeline on this? I know you said it was a summer expansion.
Torfi: The goal is to have it out on the test server in little more than a week. It's going to be very embryonic. It's funny, because it's a recurring debate: we choose to put our stuff out really early, onto a test server, even if the UI isn't finished, the core experience isn't finished, and the pipeline isn't finished. Both to get player feedback, and also just to get people hammering on it to see what it can take. Some of us would prefer not to release anything until launch day, but we feel that it's better to get as many eyes on the feature as possible, and as many fingers clicking the buttons as possible, as soon as possible. But often it's confused or mistaken for a beta or for the real thing. What they're watching is just active software development.

Very exciting! I can't wait to see it in details on the test server.