We're kicking off mobile app development. I think it's super important that an app gets built and launched quickly to be effective in the podcasting space. It works fine as a webapp, but if it's an app on my phone I'm more inclined to use it. We're focusing on the stumble functionality and 'your own private notes' first. Keep it simple, keep it narrow, build out from there. Can't wait to see how long it takes from this post to my "Mobile app launch" milestone =)