Berlin start-up Readmill, is providing a platform for eBooks that connects readers regardless of what platform they are using. Readmill's core offering is a free bookreader that competes head to head with Amazon’s and Apple’s offerings. Unlike other eReaders, Readmill is based on a device-neutral, API-driven platform that integrates social recommendations, annotations and geolocation services.
You may soon be able to "Digg This" from within your applications. The social news site's API (our Digg API profile) has long been able to list stories and other data. Now it's looking to let developers add content programmatically.