After thinking about this some more, I've come to the conclusion that 1 week per two gym badges might be a little too tight for time.
Being an experienced scrambler, I know that it takes several hours of solid playing to get one gym badge, and to get two can take two or more days. Then making updates, depending on how much effort you put into them, takes several more hours. For those of us with nothing but time, this isn't an issue, but for those of us with work and/or school, doing all this in a single week might be a little much.
As such, to try and make this a little easier on everyone involved, I suggest we make it one gym badge per a week instead of two. It'll be a lot easier to cram everything we want to say into the updates then (I know that two full gym badges will end up making VERY long updates for those of us that like going into significant detail). Besides, single gym badges make for a much easier endpoint.
Oh, and the elite four and victory road would be an extra week as well, meaning a total of 8 weeks. This is a fairly standard period of time for a let's play of a game this size and makes it a lot more feasible for those of us with other things to do to actually manage.