Amazon is testing a self-serve advertising API that will allow brands to automate and manage their Amazon advertising campaigns. According to Digiday, the API will offer brands a "systematic approach to adjusting and reporting campaigns and offer capabilities to automate the ways campaigns work."
PubSubHubbub. Say that three times fast. If you're not familiar with PubSubHubbub, it's an extension of the RSS and Atom protocol that allows the feed to push content out when it's updated. That's just the sort of technology we should see from check-in APIs like Foursquare and Gowalla.