Google blog has announced—”we've acquired Jaiku, a company that's been hard at work developing useful and innovative applications for staying in touch with the people you care about most -- regardless of whether you're at a computer or on a mobile phone.”
Jaiku.com has also posted about this acquisition, that they’ve been acquired by Google —”The Helsinki-based company was founded in early 2006, and their 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.” [about Jaiku]
Jaiku is invite-only at this time, but you can still request an invitation.