You have probably heard of Google's and Yahoo's APIs and mashups, but have you seen the AOL Mashup Gallery?
Ficlets looks particularly interesting!
"Ficlets is a collaborative short-story writing site using Creative Commons-licensed photos from Flickr as inspiration for stories, OpenID for authentication, and the AOL WIM API for authenticating AOL users." (AOL Ficlets)
Will AOL give Google and Yahoo some Web 2.0 API competition to worry about?