Excellent set of questions
Another way to tackle the issue of regional representation could be to have an regionally elected 'Executive Committee' which could have a much larger representation from the wikied community - say between 4-5 from each zone. The Advisory Board would be directly elected too. The executive with the regional representation should have the role of coordinating activities zone-wise and reporting and coordinating with the Advisory board. This would take care of region-specific issues. What do u think?
I am not comfortable with incorporating regional and gender limitations when seats come up for election each year. This will mean that the gender composition of the first board will decide the gender bias for all future positions!!! I would also agree with additional slots for gender and regional adjustments - of course we set an upper limit.
Also we need to lay out what kind of subcommittees we need - some that I can think of are the finance/funding committee, the technical committee, the social out-reach committee etc. We need collective decision in all our actions/activities.