The Daylife Enterprise API which launched today, is a service that lets you access your own content and give developers the chance to play with your offering, by giving you your own application programming interface.
Sites like Twitter and Flickr thrive because of their extensive interfaces, which allow developers to build applications that consume and interact with the content hosted thereon. My small contribution to The Big Picture and my own project Tweetpaste were/are both powered by those very APIs.
Rather than working with a well-established CMS like WordPress, Daylife’s developers produce a bespoke set of analysis tools that read your pages and help you serve your content back to you, so you can better decide how to display or manipulate it. You can also offer external developers (like me!) the opportunity to mashup your content and produce our own applications from it.
It takes a bit of reading around before you can fully understand the offering or its benefits, but the Guardian interview with Daylife’s CEO is probably a good place to start.