Roll-your-own API service Usergrid has been acquired by API management company Apigee. Usergrid could potentially help Apigee reach out to mobile developers increasingly finding themselves needing APIs to interact with their apps. It's part of a trend of developers not only being API consumers, but also API providers--at least privately to their own apps.
The cloud came tumbling down for many startups and sites based on the Amazon EC2 API today. There's a perception that storage and scaling in the cloud is supposed to mean we don't have to deal with outages. It's pretty clear that's not actually the case, as some popular sites like Heroku and Foursquare nosedived.
The popular microservices architecture for applications distributes small tasks among a suite of independently-deployable services that work in conjunction to create a larger application. This style relies on service discovery on dynamic systems, as discussed in this microservices overview.