We don't really have a preference of format. If most of our judges and eventual bundle purchasers can play it on something, it's good enough for us :)
Any details about the bundle at all? Will is be a charity bundle or will money go to devs/organizers or will it be a hybrid like humble? If there's a charity do you have any idea which one(s)?
Yep, 100% of the proceeds will go to charity. There will likely be 3-4 charities and funds will be split among them. Some of the ones we have discussed are Human Rights Warch, Doctors Without Borders, Environmental Defense Fund and some others. When they are finalized, we will announce it :)