Jaiku’s goal is to bring people closer together by enabling them to have conversations. It offers a way to connect with the people you care about by sharing updates with them on the Web, IM, and SMS – as well as through third-party applications built by other developers using the JaikuAPI.
Recently, Google announced that Jaiku, the microblogging service acquired in 2007, will be ported to the Google App Engine, and its code will be open sourced.