These updates will appear in a FriendFeed-like fashion on Yahoo members’ profile pages and in Yahoo Mail. Already, Yahoo users can get updates from friends who use Yahoo services such as Buzz and Yahoo Music (but not yet Flickr, oddly enough). Now, they can add activity streams from Yelp, SmugMug, Picassa, StumbleUpon, YouTube, Pandora, Goodreads, SlideShare, and more (see complete list below).
Back in October, when Yahoo previewed its Application Platform, the company described what it wanted to do with updates. We wrote back then:
Yahoo will let developers present their users with notifications that let them share their data back to Yahoo. For example, if their uploading photos off network, they can choose to send those photos to Flickr as well. The same goes for activity that occurs on sites like Flickr, Yahoo Music, message boards, Digg, or Facebook. Yahoo wants to provide a two-way updates platform that also pushes data updates back out to other services. So if someone does something on Digg, Yahoo can then inform a site like CNN of that action. It’s like Facebook Beacon but it doesn’t just drive data to Yahoo, it also syndicates data out to any number of sites. Also, it supports not just status-like messages but large data pushes (images, etc). All of the permission controls apply to these updates as well.
Here’s the full list of outside services that Yahoo now supports: