Joram, the 'message in a bottle' is included with the $100 and $125 digital tiers, and all physical tiers of $150 or more. The $100 tier is 12% full with the kickstarter 82% funded, so it is not in danger of filling up any time soon. Even if it does, when paypal option is started, I don't know if it would be linked to the kickstarter limits (if kickstarter was going to make it easier to manage pledges outside of kickstarter, they just would cut out the hassle and support other payment methods).
