Updates are a stream of recent events and activites that help users stay in touch with their connections (friends). Examples of updates are posting to a blog, uploading photos, and adding users to the list of connections. Updates are generated by a wide variety of Yahoo! sites and Web applications. Typically, updates are displayed on the right side of a Web page, as on Yahoo! Profiles. With the Updates API, your applications can generate and retrieve updates stored by Yahoo!.
The height and width dimensions for images included with updates should be at least 50px by 50px to ensure that images fit into update streams. Images that have height and width dimensions exceeding 80px by 80px are cropped.