Support for private updates, including private-to-groups, private within a site, and private to followers only.
Conversation mode in streams; notices appear along with all replies.
Microapps -- post different types of activities to timelines, with interaction. Events, bookmarks, Q&A, and polls included by default.
New 3-column layout in 'neo' theme by default. Older, 2-column layout themes have been removed.
Alphabetical, searchable user directory.
Alphabetical, searchable group directory.
Groups can require all posts to be private ('private groups'), and limit members to the group.
Users can make all posts private to their followers ('private stream'), and require authorization to follow.
General plugin for IM support; added AIM, IRC and MSN to existing XMPP code.
Support for Twitter-like lists, to follow other users without interfering with the home timeline.
Subscription to searches.
Subscription to tags.
Drupal-style schema system ("schemax") allows in-place database upgrades from various software versions.
Fine-grained control of URL shortening, and an internal URL shortener
Extended profile for private, enterprise sites.
sites are private by default.
Blog plugin for extended posts.
Plugin to restrict all users of a site to a single email domain.
Plugin to send a daily email summary to site users.
Deeper integration with Activity Streams (
http://activitystrea.ms) format.
Automated upgrade script.