I completely understand that you need to start with epub books. But do you have longer term plans to partner with the proprietary ebook providers? There are a lot of older Kindle eBooks without audio versions that I would love to listen to during my commute.
We do! Currently we are working with web serial authors to help create narration for their works. Support for azw, mobi formats are coming soon. There is a newsletter box near the bottom. If you subscribe, we will let you know once we launch support for those formats.