Jaiku is now a part of Google. For more details about Jaiku and Google, see the Q&A about the acquisition.

Jaiku's main goal is to bring people closer together by enabling them to share their activity streams. An activity stream is a log of everyday things as they happen: your status messages, recommendations, events you're attending, photos you've taken - anything you post directly to Jaiku or add using Web feeds. We offer a way to connect with the people you care about by sharing your activities with them on the Web, IM, and SMS - as well as through a slew of cool third-party applications built by other developers using our API.

The most powerful instrument of social peripheral vision is your mobile phone. We've put in a special effort to create Jaiku Mobile, a live phonebook that displays the activity streams, availability, and location of your Jaiku contacts right in your phone contact list. We modestly believe it is the best solution out there for seeing what your friends are up to. Currently Jaiku Mobile is available for phones based on the Nokia S60 software platform (see the list of compatible devices).