This week, Amazon announced Subscribe with Amazon. The offering is a subscription service for sellers of digital products and services. Through a series of APIs, subscription sellers can use Amazon infrastructure to offer products and services on monthly, quarterly, and yearly basis.
Salesforce has introduced a new Apex Metadata API for Force.com to help developers build self-configuring applications, upgrade scripts, and custom set-up user interfaces. The API allows applications to enable capabilities such as retrieve metadata synchronously and set up a callback on completion.