Twilio recently announced a developer preview for its new Twilio Sync offering. Twilio Sync maintains a single state synchronization infrastructure in the cloud that third party developers can utilize to introduce real-time synching and collaboration functionality into their apps.
Lately we're seeing a lot more talk about API monetization. Last week we covered TweetPhoto's efforts at encouraging developers to use the TweetPhoto API through a transactional payment model (one penny or so for each photo uploaded via the API). Last month we covered Bandsintown, which provides affiliate earnings via use of its Bandsintown API. And more recently Touchnote announced an affiliate payment model (with a whopping 30% royalty) for developers working with its image API.