Greetings,
My first thoughts are that I'm interested. Greatly interested really. Although I will admit that I do not know very much about the game itself.
My second thought is, character restrictions should be based a) on the number of players, and b) on what your particular story calls for. I don't think without a little more background information anyone could make an educated guess about what would be appropriate for character choices. It might call for everyone to be from one particular group or it might call for the people to abscond from a particular group all together. I personally don't think there is enough information to go on at this point.
On any accord, I'm certainly interested and would be willing to play any role; however, more information would be required for the particular classes of people. At least on my part - but a wiki page or website could be suitable for such measures.
I'll keep an eye out for more information or an OOC link.