I am a writer (and narrative designer), and my friend is a 3D artist. I have some experience with level design and environment art, so I can help with those things, including decoration and environmental storytelling, but I don't think I could cover that all on my own.
We also need a programmer, and possibly a composer if anyone is interested.
We have plenty of ideas, but of course we're waiting for the Jam to start planning anything. And if anyone wants to work on games with us beyond the Jam, we'd be happy to talk about that too!