Several months back, we announced SUP (Simple Update Protocol), a proposal for making RSS and Atom feed updates faster and more efficient. Since then, a number of services have added SUP support, we've SUP-enabled our feed fetcher, and there are now thousands of SUP enabled feeds being imported into FriendFeed. Among the services that now support SUP are Disqus, Brightkite, Identi.ca (and other Laconica-powered micro-blogs), BackType, and 12seconds.tv. Whenever one of these feeds is updated, the new entry appears on FriendFeed within seconds (non-SUP feeds typically take 15-30 minutes to update). Check out the public feed of Brightkite updates to see this in action.
We've also added several additional tools and resources to simplify SUP development:
- Frequently Asked Questions about SUP
- A SUP validator (source)
- An RSS/Atom Feed tester, which checks your SUP links and also shows how your feeds will be rendered on FriendFeed.
- A Public SUP feed, that anyone can link to and contribute updates. This is ideal for small publishers and individual blogs.
- Open source implementations of SUP are available as part of Laconica and Benjamin Golub's open-source blog software, as well as the example code provided by FriendFeed.