Okay. So this is how I think it will work:
I'm going to start, and I'll write the part where the shunting experiment goes wrong and sends people to another dimension. I'll need profile/bio things for any characters you want included. If you want to write it from your character's perspective later you can as well. It's optional. And then someone else (Ember may have volunteered) will invent the first dimension and do two posts--a first chapter and a brief description of anything she wants to specify about her world. Anything minor that wasn't specifically said about a place can be decided later by whoever's writing at the time. And then people who want to write for the dimension can do so, and we probably need a writing order or people can split up, whatever works. Because it's not just called the Shunting Experiment because it's an experiment that goes wrong in the plot. The entire collab is an experiment, really.
And if any of that sounds like it won't work, or you have a different idea, then comment! I'm open to suggestions and ideas of any kind, and I would love input on this idea.
Also: After the collab has started, I'm leaving the option open for anyone to guest write a dimension without joining the collab, if no one else has a particular idea that time around. Unless anyone has an objection to this.
So, um, I might start like advertising this collab in Blogland, but if I'm really annoying you, you can tell me to shut up.