This doesn't exactly use the API, but thought it might be of interest here. It's a Chrome Extension to add some features to the NPR one web player.
You can install it here: https://chrome.google.com/webstore/detail/kjofnodheplpcpbognpfnbaopmjgbfdg/publish-delayed
And check out the source here: https://github.com/hbmartin/chrome-npr-one
Let me know what you think