Topsy, a leading social analytics solutions provider, has just announced the launch of a brand new set of social data APIs that have been added to Topsy API Services. The new set of APIs allow developers to integrate social metrics, insights, and content from any time period or in real time directly into applications.
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.