Man, as much as I'd love to use Xamarin w/ VS, 3 platforms for a single developer (myself) is $3000. It looks like a great product but wow, I can't swing that solo while bootstrapping. Have you considered a free-until-release approach? Don't get me wrong, you guys need to make money, I'm just wondering if there is a more optimal / appealing approach for those that are between Indie and Business.