It's all going to wind up in JIRA anyway so why not just do it there to begin with?
I like the suggestion of a Wiki page because it allows for easier collaborative changes, in my opinion. I suspect some of what's proposed may *not* end up in JIRA for a while, so an initial round of discussion could be useful.
But of course this can also be made to work in JIRA if there's a strong preference for that...
ap
