Elgg wire plugin "The Wire" is Twitter-style microblogging plugin that allows users to post notes to the wire. You can also comment on other comments (like answering the comment: this feature is called "threaded comments"), "Like" your favourite comments, and comment directly from the river (activity page).

Addon plugins: twitterservice - push updates to twitter facebookservice - push updates to facebook statusnetservice - push updates to any status.net site twitter - pull updated from twitter tinyurl - shorten url service shorturl - shorten url service elggcrypt - encrypt wire messages riveroembed - embed videos and content automatically xmpp - send/receive wire posts via xmpp sms - send/receive wire posts via sms text messages.