The world's psychic maelstrom tells you something
interesting. At least in my book, that means telling them something that will create a conflict of interest through revelation alone, or highlight an existing conflict of interest by revealing dramatic new facts about it.
And a related thing: I'd like to talk about how the maelstrom functions or does not function in a way that's analogous to a character in the fiction. The maelstrom doesn't act like a disinterested force or entity. It acts like it's involved in what's going on. Do other people find that in their game? Is this an intentional characteristic, and what are the implications of including or not including Open your Mind in your hack?
This is something that you can run with a lot of different ways, I think. One thing to remember: if you give the Psychic Maelstrom agency, give it a threat type. Most of the landscapes are pretty interesting to think about, but I've also gotten a lot of mileage out of "Disease Vector" and "Mindfucker", myself.
And in contrast to what Orly said, my personal advice would be to give the psychic maelstrom whatever information it needs to make your characters' lives more interesting. (And keep the world real, of course, but you've got more wiggle room for that agenda when you're talking about the psychic maelstrom as opposed to more mundane aspects of the world.)
Now, HERE'S a related question for you all. What has happened, in actual play, when characters in games you've been in have gotten the expanded "open your brain the the world's psychic maelstrom" move, and rolled a 12+? What's beyond that sucker, ladies and gentlemen?
In one game I was running, the apocalypse was sort of an endless nuclear winter scenario, the skies eternally choked by the ashes and smoke created by civilization-that-was going up in flames. Gradually I invoked some of this imagery into the world's psychic maelstrom, ash demons and it being smoky and choking and whatnot, until I realized that the death-cloud blotting out the sun and skies and the world's psychic maelstrom were the same thing. So, naturally, when a character managed to pierce "beyond" the world's psychic maelstrom (which they only managed to accomplish as their dying act), they punched through, and a single shaft of sunlight, the first the world had seen in 50 years, fell down upon their corpse, with green shoots blooming up almost instantly around them. (Cue end credits).
But I'm curious what other people have done with the expanded move!