Would it be a good idea if instead of making it by alphabetical order, make it by signing up? This sign up could be weekly so anybody could "apply" for that week depending on how the story is going (if it adjusts to the characters/vehicles/locations or finally ideas one can have).

The idea of this is because some of us sometimes can't post on a specific week due to other compromises, and it would be complicated if you miss your turn because you would have to wait several weeks to post again in the ongoing story.

Now, how to select which of the participants signing up would be selected for each week, could be decided at random (roll a d20?) by the admins. The signing up could close on wednesdays and the selected guy for that weekend would be announced on thursday with a backup in case the selected guy would have an emergency that weekend.

It's just an idea.

Bartus.